diff --git a/src/app/(dashboard)/[portSlug]/admin/audit/page.tsx b/src/app/(dashboard)/[portSlug]/admin/audit/page.tsx
index 4f0a82f..731a3fd 100644
--- a/src/app/(dashboard)/[portSlug]/admin/audit/page.tsx
+++ b/src/app/(dashboard)/[portSlug]/admin/audit/page.tsx
@@ -1,16 +1,5 @@
+import { AuditLogList } from '@/components/admin/audit/audit-log-list';
+
 export default function AuditLogPage() {
-  return (
-    <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Audit Log</h1>
-        <p className="text-muted-foreground">Review system activity and changes</p>
-      </div>
-      <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
-        <p className="text-lg font-medium text-muted-foreground">Coming in Layer 2</p>
-        <p className="text-sm text-muted-foreground">
-          This feature will be implemented in the next phase.
-        </p>
-      </div>
-    </div>
-  );
+  return <AuditLogList />;
 }
diff --git a/src/app/(dashboard)/[portSlug]/settings/page.tsx b/src/app/(dashboard)/[portSlug]/settings/page.tsx
index 36c1254..360c07f 100644
--- a/src/app/(dashboard)/[portSlug]/settings/page.tsx
+++ b/src/app/(dashboard)/[portSlug]/settings/page.tsx
@@ -1,16 +1,5 @@
+import { UserSettings } from '@/components/settings/user-settings';
+
 export default function SettingsPage() {
-  return (
-    <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Settings</h1>
-        <p className="text-muted-foreground">Manage your account and port preferences</p>
-      </div>
-      <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
-        <p className="text-lg font-medium text-muted-foreground">Coming in Layer 2</p>
-        <p className="text-sm text-muted-foreground">
-          This feature will be implemented in the next phase.
-        </p>
-      </div>
-    </div>
-  );
+  return <UserSettings />;
 }
diff --git a/src/app/api/v1/admin/audit/route.ts b/src/app/api/v1/admin/audit/route.ts
new file mode 100644
index 0000000..f9d34d6
--- /dev/null
+++ b/src/app/api/v1/admin/audit/route.ts
@@ -0,0 +1,31 @@
+import { NextResponse } from 'next/server';
+import { z } from 'zod';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { parseQuery } from '@/lib/api/route-helpers';
+import { listAuditLogs } from '@/lib/services/audit.service';
+import { errorResponse } from '@/lib/errors';
+
+const auditQuerySchema = z.object({
+  page: z.coerce.number().int().min(1).default(1),
+  limit: z.coerce.number().int().min(1).max(100).default(50),
+  entityType: z.string().optional(),
+  action: z.string().optional(),
+  userId: z.string().optional(),
+  entityId: z.string().optional(),
+  dateFrom: z.string().optional(),
+  dateTo: z.string().optional(),
+  search: z.string().optional(),
+});
+
+export const GET = withAuth(
+  withPermission('admin', 'view_audit_log', async (req, ctx) => {
+    try {
+      const query = parseQuery(req, auditQuerySchema);
+      const result = await listAuditLogs(ctx.portId, query);
+      return NextResponse.json(result);
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/app/api/v1/berths/[id]/route.ts b/src/app/api/v1/berths/[id]/route.ts
index 2f78c8f..5df2ee9 100644
--- a/src/app/api/v1/berths/[id]/route.ts
+++ b/src/app/api/v1/berths/[id]/route.ts
@@ -3,7 +3,7 @@ import { NextResponse } from 'next/server';
 import { withAuth, withPermission } from '@/lib/api/helpers';
 import { parseBody } from '@/lib/api/route-helpers';
 import { updateBerthSchema } from '@/lib/validators/berths';
-import { getBerthById, updateBerth } from '@/lib/services/berths.service';
+import { getBerthById, updateBerth, deleteBerth } from '@/lib/services/berths.service';
 import { errorResponse } from '@/lib/errors';
 
 // GET /api/v1/berths/[id]
@@ -18,7 +18,7 @@ export const GET = withAuth(
   }),
 );
 
-// PATCH /api/v1/berths/[id] — update berth fields (no DELETE — import-only)
+// PATCH /api/v1/berths/[id]
 export const PATCH = withAuth(
   withPermission('berths', 'edit', async (req, ctx, params) => {
     try {
@@ -35,3 +35,20 @@ export const PATCH = withAuth(
     }
   }),
 );
+
+// DELETE /api/v1/berths/[id]
+export const DELETE = withAuth(
+  withPermission('berths', 'edit', async (_req, ctx, params) => {
+    try {
+      await deleteBerth(params.id!, ctx.portId, {
+        userId: ctx.userId,
+        portId: ctx.portId,
+        ipAddress: ctx.ipAddress,
+        userAgent: ctx.userAgent,
+      });
+      return NextResponse.json({ success: true });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/app/api/v1/berths/route.ts b/src/app/api/v1/berths/route.ts
index 73a25fd..9df90e0 100644
--- a/src/app/api/v1/berths/route.ts
+++ b/src/app/api/v1/berths/route.ts
@@ -1,12 +1,11 @@
 import { NextResponse } from 'next/server';
 
 import { withAuth, withPermission } from '@/lib/api/helpers';
-import { parseQuery } from '@/lib/api/route-helpers';
-import { listBerthsSchema } from '@/lib/validators/berths';
-import { listBerths } from '@/lib/services/berths.service';
+import { parseBody, parseQuery } from '@/lib/api/route-helpers';
+import { listBerthsSchema, createBerthSchema } from '@/lib/validators/berths';
+import { listBerths, createBerth } from '@/lib/services/berths.service';
 import { errorResponse } from '@/lib/errors';
 
-// GET /api/v1/berths — list berths for the current port (no POST — import-only)
 export const GET = withAuth(
   withPermission('berths', 'view', async (req, ctx) => {
     try {
@@ -34,3 +33,20 @@ export const GET = withAuth(
     }
   }),
 );
+
+export const POST = withAuth(
+  withPermission('berths', 'edit', async (req, ctx) => {
+    try {
+      const body = await parseBody(req, createBerthSchema);
+      const data = await createBerth(ctx.portId, body, {
+        userId: ctx.userId,
+        portId: ctx.portId,
+        ipAddress: ctx.ipAddress,
+        userAgent: ctx.userAgent,
+      });
+      return NextResponse.json({ data }, { status: 201 });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/app/api/v1/clients/duplicates/route.ts b/src/app/api/v1/clients/duplicates/route.ts
new file mode 100644
index 0000000..23e5ad5
--- /dev/null
+++ b/src/app/api/v1/clients/duplicates/route.ts
@@ -0,0 +1,23 @@
+import { NextResponse } from 'next/server';
+import { z } from 'zod';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { parseQuery } from '@/lib/api/route-helpers';
+import { findDuplicates } from '@/lib/services/clients.service';
+import { errorResponse } from '@/lib/errors';
+
+const duplicateQuerySchema = z.object({
+  name: z.string().min(1),
+});
+
+export const GET = withAuth(
+  withPermission('clients', 'view', async (req, ctx) => {
+    try {
+      const { name } = parseQuery(req, duplicateQuerySchema);
+      const data = await findDuplicates(ctx.portId, name);
+      return NextResponse.json({ data });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/app/api/v1/me/route.ts b/src/app/api/v1/me/route.ts
index 2a5be16..ad08d1b 100644
--- a/src/app/api/v1/me/route.ts
+++ b/src/app/api/v1/me/route.ts
@@ -1,5 +1,26 @@
 import { NextResponse } from 'next/server';
+import { eq } from 'drizzle-orm';
+
 import { withAuth, type AuthContext } from '@/lib/api/helpers';
+import { parseBody } from '@/lib/api/route-helpers';
+import { db } from '@/lib/db';
+import { userProfiles } from '@/lib/db/schema';
+import { errorResponse } from '@/lib/errors';
+import { z } from 'zod';
+
+const updateProfileSchema = z.object({
+  displayName: z.string().min(1).max(200).optional(),
+  phone: z.string().nullable().optional(),
+  avatarUrl: z.string().url().nullable().optional(),
+  preferences: z
+    .object({
+      dark_mode: z.boolean().optional(),
+      locale: z.string().optional(),
+      timezone: z.string().optional(),
+    })
+    .passthrough()
+    .optional(),
+});
 
 export const GET = withAuth(async (_req, ctx: AuthContext) => {
   return NextResponse.json({
@@ -13,3 +34,45 @@ export const GET = withAuth(async (_req, ctx: AuthContext) => {
     },
   });
 });
+
+export const PATCH = withAuth(async (req, ctx: AuthContext) => {
+  try {
+    const body = await parseBody(req, updateProfileSchema);
+
+    const profile = await db.query.userProfiles.findFirst({
+      where: eq(userProfiles.userId, ctx.userId),
+    });
+    if (!profile) {
+      return NextResponse.json({ error: 'Profile not found' }, { status: 404 });
+    }
+
+    const updates: Record<string, unknown> = { updatedAt: new Date() };
+    if (body.displayName !== undefined) updates.displayName = body.displayName;
+    if (body.phone !== undefined) updates.phone = body.phone;
+    if (body.avatarUrl !== undefined) updates.avatarUrl = body.avatarUrl;
+    if (body.preferences !== undefined) {
+      updates.preferences = {
+        ...((profile.preferences as Record<string, unknown>) ?? {}),
+        ...body.preferences,
+      };
+    }
+
+    const [updated] = await db
+      .update(userProfiles)
+      .set(updates)
+      .where(eq(userProfiles.userId, ctx.userId))
+      .returning();
+
+    return NextResponse.json({
+      data: {
+        userId: updated!.userId,
+        displayName: updated!.displayName,
+        phone: updated!.phone,
+        avatarUrl: updated!.avatarUrl,
+        preferences: updated!.preferences,
+      },
+    });
+  } catch (error) {
+    return errorResponse(error);
+  }
+});
diff --git a/src/components/admin/audit/audit-log-list.tsx b/src/components/admin/audit/audit-log-list.tsx
new file mode 100644
index 0000000..d4daaff
--- /dev/null
+++ b/src/components/admin/audit/audit-log-list.tsx
@@ -0,0 +1,257 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { type ColumnDef } from '@tanstack/react-table';
+import { formatDistanceToNow } from 'date-fns';
+import { Search } from 'lucide-react';
+
+import { DataTable } from '@/components/shared/data-table';
+import { PageHeader } from '@/components/shared/page-header';
+import { Badge } from '@/components/ui/badge';
+import { Input } from '@/components/ui/input';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select';
+import { apiFetch } from '@/lib/api/client';
+
+interface AuditEntry {
+  id: string;
+  userId: string | null;
+  action: string;
+  entityType: string;
+  entityId: string;
+  fieldChanged: string | null;
+  oldValue: Record<string, unknown> | null;
+  newValue: Record<string, unknown> | null;
+  metadata: Record<string, unknown> | null;
+  ipAddress: string | null;
+  createdAt: string;
+}
+
+const ACTION_COLORS: Record<string, string> = {
+  create: 'bg-green-600',
+  update: 'bg-blue-500',
+  delete: 'bg-red-600',
+  archive: 'bg-orange-500',
+  restore: 'bg-teal-500',
+  login: 'bg-gray-500',
+  permission_denied: 'bg-red-800',
+};
+
+const ENTITY_TYPES = [
+  'client',
+  'interest',
+  'berth',
+  'document',
+  'expense',
+  'invoice',
+  'reminder',
+  'user',
+  'role',
+  'port',
+  'setting',
+  'tag',
+  'webhook',
+];
+
+export function AuditLogList() {
+  const [entries, setEntries] = useState<AuditEntry[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [total, setTotal] = useState(0);
+  const [page, setPage] = useState(1);
+  const [entityTypeFilter, setEntityTypeFilter] = useState<string>('all');
+  const [actionFilter, setActionFilter] = useState<string>('all');
+  const [search, setSearch] = useState('');
+
+  const fetchLogs = useCallback(async () => {
+    setLoading(true);
+    try {
+      const params = new URLSearchParams({
+        page: String(page),
+        limit: '50',
+      });
+      if (entityTypeFilter !== 'all') params.set('entityType', entityTypeFilter);
+      if (actionFilter !== 'all') params.set('action', actionFilter);
+      if (search) params.set('search', search);
+
+      const res = await apiFetch<{
+        data: AuditEntry[];
+        pagination: { total: number };
+      }>(`/api/v1/admin/audit?${params}`);
+      setEntries(res.data);
+      setTotal(res.pagination.total);
+    } finally {
+      setLoading(false);
+    }
+  }, [page, entityTypeFilter, actionFilter, search]);
+
+  useEffect(() => {
+    void fetchLogs();
+  }, [fetchLogs]);
+
+  const columns: ColumnDef<AuditEntry, unknown>[] = [
+    {
+      accessorKey: 'createdAt',
+      header: 'Time',
+      cell: ({ row }) => (
+        <div className="text-sm">
+          <div>{new Date(row.original.createdAt).toLocaleString()}</div>
+          <div className="text-xs text-muted-foreground">
+            {formatDistanceToNow(new Date(row.original.createdAt), { addSuffix: true })}
+          </div>
+        </div>
+      ),
+      size: 180,
+    },
+    {
+      accessorKey: 'action',
+      header: 'Action',
+      cell: ({ row }) => (
+        <Badge
+          className={`${ACTION_COLORS[row.original.action] ?? 'bg-gray-500'} text-white text-xs`}
+        >
+          {row.original.action}
+        </Badge>
+      ),
+      size: 100,
+    },
+    {
+      accessorKey: 'entityType',
+      header: 'Entity',
+      cell: ({ row }) => (
+        <div>
+          <span className="font-medium capitalize">{row.original.entityType}</span>
+          <code className="ml-2 text-xs text-muted-foreground">
+            {row.original.entityId.slice(0, 8)}...
+          </code>
+        </div>
+      ),
+    },
+    {
+      id: 'changes',
+      header: 'Changes',
+      cell: ({ row }) => {
+        const { newValue, fieldChanged } = row.original;
+        if (fieldChanged) return <span className="text-sm">{fieldChanged}</span>;
+        if (newValue) {
+          const keys = Object.keys(newValue);
+          return (
+            <span className="text-xs text-muted-foreground">
+              {keys.slice(0, 3).join(', ')}
+              {keys.length > 3 ? ` +${keys.length - 3} more` : ''}
+            </span>
+          );
+        }
+        return <span className="text-xs text-muted-foreground">—</span>;
+      },
+    },
+    {
+      accessorKey: 'userId',
+      header: 'User',
+      cell: ({ row }) => (
+        <code className="text-xs">
+          {row.original.userId ? row.original.userId.slice(0, 8) + '...' : 'system'}
+        </code>
+      ),
+      size: 100,
+    },
+  ];
+
+  return (
+    <div>
+      <PageHeader title="Audit Log" description={`${total} entries`} />
+
+      <div className="flex items-center gap-3 mb-4">
+        <div className="relative flex-1 max-w-sm">
+          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
+          <Input
+            className="pl-9"
+            placeholder="Search..."
+            value={search}
+            onChange={(e) => {
+              setSearch(e.target.value);
+              setPage(1);
+            }}
+          />
+        </div>
+        <Select
+          value={entityTypeFilter}
+          onValueChange={(v) => {
+            setEntityTypeFilter(v);
+            setPage(1);
+          }}
+        >
+          <SelectTrigger className="w-36">
+            <SelectValue />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="all">All Entities</SelectItem>
+            {ENTITY_TYPES.map((t) => (
+              <SelectItem key={t} value={t}>
+                {t.charAt(0).toUpperCase() + t.slice(1)}
+              </SelectItem>
+            ))}
+          </SelectContent>
+        </Select>
+        <Select
+          value={actionFilter}
+          onValueChange={(v) => {
+            setActionFilter(v);
+            setPage(1);
+          }}
+        >
+          <SelectTrigger className="w-36">
+            <SelectValue />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="all">All Actions</SelectItem>
+            <SelectItem value="create">Create</SelectItem>
+            <SelectItem value="update">Update</SelectItem>
+            <SelectItem value="delete">Delete</SelectItem>
+            <SelectItem value="archive">Archive</SelectItem>
+            <SelectItem value="restore">Restore</SelectItem>
+            <SelectItem value="permission_denied">Permission Denied</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+
+      <DataTable
+        columns={columns}
+        data={entries}
+        isLoading={loading}
+        getRowId={(row) => row.id}
+        emptyState={
+          <div className="text-center py-8">
+            <p className="text-muted-foreground">No audit log entries found.</p>
+          </div>
+        }
+      />
+
+      {total > 50 && (
+        <div className="flex items-center justify-center gap-2 mt-4">
+          <button
+            className="text-sm text-muted-foreground hover:text-foreground disabled:opacity-50"
+            disabled={page <= 1}
+            onClick={() => setPage((p) => p - 1)}
+          >
+            Previous
+          </button>
+          <span className="text-sm text-muted-foreground">
+            Page {page} of {Math.ceil(total / 50)}
+          </span>
+          <button
+            className="text-sm text-muted-foreground hover:text-foreground disabled:opacity-50"
+            disabled={page >= Math.ceil(total / 50)}
+            onClick={() => setPage((p) => p + 1)}
+          >
+            Next
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/src/components/settings/user-settings.tsx b/src/components/settings/user-settings.tsx
new file mode 100644
index 0000000..27e3522
--- /dev/null
+++ b/src/components/settings/user-settings.tsx
@@ -0,0 +1,174 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { Save } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { Switch } from '@/components/ui/switch';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { PageHeader } from '@/components/shared/page-header';
+import { apiFetch } from '@/lib/api/client';
+
+interface NotificationPrefs {
+  reminder_due: boolean;
+  reminder_overdue: boolean;
+  eoi_signed: boolean;
+  eoi_completed: boolean;
+  invoice_overdue: boolean;
+  duplicate_alert: boolean;
+  [key: string]: boolean;
+}
+
+export function UserSettings() {
+  const [notifPrefs, setNotifPrefs] = useState<NotificationPrefs | null>(null);
+  const [displayName, setDisplayName] = useState('');
+  const [phone, setPhone] = useState('');
+  const [timezone, setTimezone] = useState('');
+  const [saving, setSaving] = useState<string | null>(null);
+  const [message, setMessage] = useState<string | null>(null);
+
+  useEffect(() => {
+    void loadProfile();
+    void loadNotificationPrefs();
+  }, []);
+
+  async function loadProfile() {
+    const res = await apiFetch<{ data: { user?: { name: string } } }>('/api/v1/me', {
+      method: 'GET',
+    });
+    setDisplayName(res.data.user?.name ?? '');
+  }
+
+  async function loadNotificationPrefs() {
+    try {
+      const res = await apiFetch<{ data: NotificationPrefs }>('/api/v1/notifications/preferences');
+      setNotifPrefs(res.data);
+    } catch {
+      // Preferences may not exist yet
+      setNotifPrefs({
+        reminder_due: true,
+        reminder_overdue: true,
+        eoi_signed: true,
+        eoi_completed: true,
+        invoice_overdue: true,
+        duplicate_alert: true,
+      });
+    }
+  }
+
+  async function saveProfile() {
+    setSaving('profile');
+    setMessage(null);
+    try {
+      await apiFetch('/api/v1/me', {
+        method: 'PATCH',
+        body: {
+          displayName: displayName || undefined,
+          phone: phone || null,
+          preferences: { timezone: timezone || undefined },
+        },
+      });
+      setMessage('Profile saved');
+    } catch (err: unknown) {
+      setMessage(err instanceof Error ? err.message : 'Failed to save');
+    } finally {
+      setSaving(null);
+    }
+  }
+
+  async function toggleNotifPref(key: string, value: boolean) {
+    setSaving(key);
+    try {
+      await apiFetch('/api/v1/notifications/preferences', {
+        method: 'PATCH',
+        body: { [key]: value },
+      });
+      setNotifPrefs((prev) => (prev ? { ...prev, [key]: value } : prev));
+    } finally {
+      setSaving(null);
+    }
+  }
+
+  const NOTIF_LABELS: Record<string, string> = {
+    reminder_due: 'Reminder due',
+    reminder_overdue: 'Reminder overdue',
+    eoi_signed: 'EOI signed by a party',
+    eoi_completed: 'EOI fully completed',
+    invoice_overdue: 'Invoice overdue',
+    duplicate_alert: 'Duplicate client detected',
+  };
+
+  return (
+    <div>
+      <PageHeader title="Settings" description="Manage your profile and notification preferences" />
+
+      <div className="mt-6 space-y-6 max-w-2xl">
+        <Card>
+          <CardHeader>
+            <CardTitle>Profile</CardTitle>
+            <CardDescription>Update your display name and contact info</CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <div className="space-y-2">
+              <Label htmlFor="settings-name">Display Name</Label>
+              <Input
+                id="settings-name"
+                value={displayName}
+                onChange={(e) => setDisplayName(e.target.value)}
+                placeholder="Your name"
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="settings-phone">Phone</Label>
+              <Input
+                id="settings-phone"
+                type="tel"
+                value={phone}
+                onChange={(e) => setPhone(e.target.value)}
+                placeholder="+1 555-0123"
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="settings-tz">Timezone</Label>
+              <Input
+                id="settings-tz"
+                value={timezone}
+                onChange={(e) => setTimezone(e.target.value)}
+                placeholder="America/Anguilla"
+              />
+            </div>
+            <div className="flex items-center gap-3">
+              <Button onClick={saveProfile} disabled={saving === 'profile'}>
+                <Save className="mr-1.5 h-4 w-4" />
+                {saving === 'profile' ? 'Saving...' : 'Save Profile'}
+              </Button>
+              {message && <span className="text-sm text-muted-foreground">{message}</span>}
+            </div>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader>
+            <CardTitle>Notifications</CardTitle>
+            <CardDescription>Choose which notifications you receive</CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            {notifPrefs &&
+              Object.entries(NOTIF_LABELS).map(([key, label]) => (
+                <div key={key} className="flex items-center justify-between">
+                  <Label>{label}</Label>
+                  <Switch
+                    checked={notifPrefs[key] ?? true}
+                    disabled={saving === key}
+                    onCheckedChange={(checked) => toggleNotifPref(key, checked)}
+                  />
+                </div>
+              ))}
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  );
+}
diff --git a/src/lib/services/audit.service.ts b/src/lib/services/audit.service.ts
new file mode 100644
index 0000000..df4175a
--- /dev/null
+++ b/src/lib/services/audit.service.ts
@@ -0,0 +1,57 @@
+import { and, eq, desc, sql, gte, lte } from 'drizzle-orm';
+
+import { db } from '@/lib/db';
+import { auditLogs } from '@/lib/db/schema';
+
+interface AuditListQuery {
+  page: number;
+  limit: number;
+  entityType?: string;
+  action?: string;
+  userId?: string;
+  entityId?: string;
+  dateFrom?: string;
+  dateTo?: string;
+  search?: string;
+}
+
+export async function listAuditLogs(portId: string, query: AuditListQuery) {
+  const conditions = [eq(auditLogs.portId, portId)];
+
+  if (query.entityType) conditions.push(eq(auditLogs.entityType, query.entityType));
+  if (query.action) conditions.push(eq(auditLogs.action, query.action));
+  if (query.userId) conditions.push(eq(auditLogs.userId, query.userId));
+  if (query.entityId) conditions.push(eq(auditLogs.entityId, query.entityId));
+  if (query.dateFrom) conditions.push(gte(auditLogs.createdAt, new Date(query.dateFrom)));
+  if (query.dateTo) conditions.push(lte(auditLogs.createdAt, new Date(query.dateTo)));
+  if (query.search) {
+    conditions.push(
+      sql`(${auditLogs.entityType} ILIKE ${'%' + query.search + '%'} OR ${auditLogs.action} ILIKE ${'%' + query.search + '%'})`,
+    );
+  }
+
+  const offset = (query.page - 1) * query.limit;
+
+  const [data, countResult] = await Promise.all([
+    db
+      .select()
+      .from(auditLogs)
+      .where(and(...conditions))
+      .orderBy(desc(auditLogs.createdAt))
+      .limit(query.limit)
+      .offset(offset),
+    db
+      .select({ count: sql<number>`count(*)` })
+      .from(auditLogs)
+      .where(and(...conditions)),
+  ]);
+
+  return {
+    data,
+    pagination: {
+      page: query.page,
+      limit: query.limit,
+      total: Number(countResult[0]?.count ?? 0),
+    },
+  };
+}
diff --git a/src/lib/services/berths.service.ts b/src/lib/services/berths.service.ts
index a91ff8f..d21e01d 100644
--- a/src/lib/services/berths.service.ts
+++ b/src/lib/services/berths.service.ts
@@ -1,19 +1,16 @@
 import { and, eq, gte, lte, inArray } from 'drizzle-orm';
 
 import { db } from '@/lib/db';
-import {
-  berths,
-  berthTags,
-  berthWaitingList,
-  berthMaintenanceLog,
-} from '@/lib/db/schema/berths';
+import { berths, berthTags, berthWaitingList, berthMaintenanceLog } from '@/lib/db/schema/berths';
 import { tags } from '@/lib/db/schema/system';
 import { createAuditLog } from '@/lib/audit';
 import { diffEntity } from '@/lib/entity-diff';
 import { NotFoundError } from '@/lib/errors';
 import { buildListQuery } from '@/lib/db/query-builder';
 import { emitToRoom } from '@/lib/socket/server';
+import { ConflictError } from '@/lib/errors';
 import type {
+  CreateBerthInput,
   UpdateBerthInput,
   UpdateBerthStatusInput,
   ListBerthsQuery,
@@ -71,12 +68,18 @@ export async function listBerths(portId: string, query: ListBerthsQuery) {
 
   const sortColumn = (() => {
     switch (query.sort) {
-      case 'mooringNumber': return berths.mooringNumber;
-      case 'area': return berths.area;
-      case 'price': return berths.price;
-      case 'status': return berths.status;
-      case 'lengthM': return berths.lengthM;
-      default: return berths.updatedAt;
+      case 'mooringNumber':
+        return berths.mooringNumber;
+      case 'area':
+        return berths.area;
+      case 'price':
+        return berths.price;
+      case 'status':
+        return berths.status;
+      case 'lengthM':
+        return berths.lengthM;
+      default:
+        return berths.updatedAt;
     }
   })();
 
@@ -161,7 +164,10 @@ export async function updateBerth(
   });
   if (!existing) throw new NotFoundError('Berth');
 
-  const { changed, diff } = diffEntity(existing as Record<string, unknown>, data as Record<string, unknown>);
+  const { changed, diff } = diffEntity(
+    existing as Record<string, unknown>,
+    data as Record<string, unknown>,
+  );
 
   if (!changed) return existing;
 
@@ -288,12 +294,7 @@ export async function updateBerthStatus(
 
 // ─── Set Tags ─────────────────────────────────────────────────────────────────
 
-export async function setBerthTags(
-  id: string,
-  portId: string,
-  tagIds: string[],
-  meta: AuditMeta,
-) {
+export async function setBerthTags(id: string, portId: string, tagIds: string[], meta: AuditMeta) {
   const existing = await db.query.berths.findFirst({
     where: and(eq(berths.id, id), eq(berths.portId, portId)),
   });
@@ -454,6 +455,90 @@ export async function updateWaitingList(
   return data.entries;
 }
 
+// ─── Create ──────────────────────────────────────────────────────────────────
+
+export async function createBerth(portId: string, data: CreateBerthInput, meta: AuditMeta) {
+  // Check mooring number uniqueness within port
+  const existing = await db.query.berths.findFirst({
+    where: and(eq(berths.portId, portId), eq(berths.mooringNumber, data.mooringNumber)),
+  });
+  if (existing) {
+    throw new ConflictError(`Berth "${data.mooringNumber}" already exists in this port`);
+  }
+
+  const [berth] = await db
+    .insert(berths)
+    .values({
+      portId,
+      mooringNumber: data.mooringNumber,
+      area: data.area,
+      status: data.status ?? 'available',
+      lengthFt: data.lengthFt?.toString(),
+      lengthM: data.lengthM?.toString(),
+      widthFt: data.widthFt?.toString(),
+      widthM: data.widthM?.toString(),
+      draftFt: data.draftFt?.toString(),
+      draftM: data.draftM?.toString(),
+      price: data.price?.toString(),
+      priceCurrency: data.priceCurrency ?? 'USD',
+      tenureType: data.tenureType ?? 'permanent',
+      mooringType: data.mooringType,
+      powerCapacity: data.powerCapacity,
+      voltage: data.voltage,
+      access: data.access,
+      bowFacing: data.bowFacing,
+      sidePontoon: data.sidePontoon,
+    })
+    .returning();
+
+  void createAuditLog({
+    userId: meta.userId,
+    portId,
+    action: 'create',
+    entityType: 'berth',
+    entityId: berth!.id,
+    newValue: { mooringNumber: berth!.mooringNumber, area: berth!.area },
+    ipAddress: meta.ipAddress,
+    userAgent: meta.userAgent,
+  });
+
+  emitToRoom(`port:${portId}`, 'system:alert', {
+    alertType: 'berth:created',
+    message: `Berth "${berth!.mooringNumber}" created`,
+    severity: 'info',
+  });
+
+  return berth!;
+}
+
+// ─── Delete ─────────────────────────────────────────────────────────────────
+
+export async function deleteBerth(id: string, portId: string, meta: AuditMeta) {
+  const berth = await db.query.berths.findFirst({
+    where: and(eq(berths.id, id), eq(berths.portId, portId)),
+  });
+  if (!berth) throw new NotFoundError('Berth');
+
+  await db.delete(berths).where(and(eq(berths.id, id), eq(berths.portId, portId)));
+
+  void createAuditLog({
+    userId: meta.userId,
+    portId,
+    action: 'delete',
+    entityType: 'berth',
+    entityId: id,
+    oldValue: { mooringNumber: berth.mooringNumber, area: berth.area },
+    ipAddress: meta.ipAddress,
+    userAgent: meta.userAgent,
+  });
+
+  emitToRoom(`port:${portId}`, 'system:alert', {
+    alertType: 'berth:deleted',
+    message: `Berth "${berth.mooringNumber}" deleted`,
+    severity: 'info',
+  });
+}
+
 // ─── Options ──────────────────────────────────────────────────────────────────
 
 export async function getBerthOptions(portId: string) {
diff --git a/src/lib/validators/berths.ts b/src/lib/validators/berths.ts
index 1c65408..e4f3f7b 100644
--- a/src/lib/validators/berths.ts
+++ b/src/lib/validators/berths.ts
@@ -2,6 +2,31 @@ import { z } from 'zod';
 import { BERTH_STATUSES } from '@/lib/constants';
 import { baseListQuerySchema } from '@/lib/api/route-helpers';
 
+// ─── Create Berth ────────────────────────────────────────────────────────────
+
+export const createBerthSchema = z.object({
+  mooringNumber: z.string().min(1),
+  area: z.string().min(1),
+  lengthFt: z.coerce.number().optional(),
+  lengthM: z.coerce.number().optional(),
+  widthFt: z.coerce.number().optional(),
+  widthM: z.coerce.number().optional(),
+  draftFt: z.coerce.number().optional(),
+  draftM: z.coerce.number().optional(),
+  price: z.coerce.number().optional(),
+  priceCurrency: z.string().optional(),
+  status: z.enum(BERTH_STATUSES).default('available'),
+  tenureType: z.enum(['permanent', 'fixed_term']).optional(),
+  mooringType: z.string().optional(),
+  powerCapacity: z.string().optional(),
+  voltage: z.string().optional(),
+  access: z.string().optional(),
+  bowFacing: z.string().optional(),
+  sidePontoon: z.string().optional(),
+});
+
+export type CreateBerthInput = z.infer<typeof createBerthSchema>;
+
 // ─── Update Berth ─────────────────────────────────────────────────────────────
 
 export const updateBerthSchema = z.object({