diff --git a/src/lib/services/yachts.service.ts b/src/lib/services/yachts.service.ts
index 7652dcd..0679cd0 100644
--- a/src/lib/services/yachts.service.ts
+++ b/src/lib/services/yachts.service.ts
@@ -1,17 +1,20 @@
-import { and, eq, sql } from 'drizzle-orm';
+import { and, eq, ilike, or, sql } from 'drizzle-orm';
 import { db } from '@/lib/db';
 import { yachts, yachtOwnershipHistory, clients } from '@/lib/db/schema';
+import type { Yacht } from '@/lib/db/schema/yachts';
 import { companies } from '@/lib/db/schema/companies';
 import { createAuditLog } from '@/lib/audit';
 import { NotFoundError, ValidationError } from '@/lib/errors';
 import { emitToRoom } from '@/lib/socket/server';
 import { diffEntity } from '@/lib/entity-diff';
+import { buildListQuery } from '@/lib/db/query-builder';
 import { withTransaction } from '@/lib/db/utils';
 import type { z } from 'zod';
 import type {
   createYachtSchema,
   UpdateYachtInput,
   TransferOwnershipInput,
+  ListYachtsInput,
 } from '@/lib/validators/yachts';
 
 type CreateYachtInput = z.input<typeof createYachtSchema>;
@@ -263,3 +266,74 @@ export async function transferOwnership(
     return updated!;
   });
 }
+
+// ─── List ─────────────────────────────────────────────────────────────────────
+
+export async function listYachts(portId: string, query: ListYachtsInput) {
+  const { page, limit, sort, order, search, includeArchived, ownerType, ownerId, status } = query;
+
+  const filters = [];
+  if (ownerType) filters.push(eq(yachts.currentOwnerType, ownerType));
+  if (ownerId) filters.push(eq(yachts.currentOwnerId, ownerId));
+  if (status) filters.push(eq(yachts.status, status));
+
+  let sortColumn: typeof yachts.name | typeof yachts.createdAt | typeof yachts.updatedAt =
+    yachts.updatedAt;
+  if (sort === 'name') sortColumn = yachts.name;
+  else if (sort === 'createdAt') sortColumn = yachts.createdAt;
+
+  const result = await buildListQuery<Yacht>({
+    table: yachts,
+    portIdColumn: yachts.portId,
+    portId,
+    idColumn: yachts.id,
+    updatedAtColumn: yachts.updatedAt,
+    searchColumns: [yachts.name, yachts.hullNumber, yachts.registration],
+    searchTerm: search,
+    filters,
+    sort: sort ? { column: sortColumn, direction: order } : undefined,
+    page,
+    pageSize: limit,
+    includeArchived,
+    archivedAtColumn: yachts.archivedAt,
+  });
+
+  return result;
+}
+
+// ─── List for owner ───────────────────────────────────────────────────────────
+
+export async function listYachtsForOwner(
+  portId: string,
+  ownerType: 'client' | 'company',
+  ownerId: string,
+) {
+  return await db.query.yachts.findMany({
+    where: and(
+      eq(yachts.portId, portId),
+      eq(yachts.currentOwnerType, ownerType),
+      eq(yachts.currentOwnerId, ownerId),
+    ),
+    orderBy: (t, { desc }) => [desc(t.updatedAt)],
+  });
+}
+
+// ─── Autocomplete ─────────────────────────────────────────────────────────────
+
+export async function autocomplete(portId: string, q: string) {
+  const pattern = `%${q}%`;
+  return await db
+    .select()
+    .from(yachts)
+    .where(
+      and(
+        eq(yachts.portId, portId),
+        or(
+          ilike(yachts.name, pattern),
+          ilike(yachts.hullNumber, pattern),
+          ilike(yachts.registration, pattern),
+        ),
+      ),
+    )
+    .limit(10);
+}
diff --git a/tests/helpers/factories.ts b/tests/helpers/factories.ts
index 87df389..188f9fb 100644
--- a/tests/helpers/factories.ts
+++ b/tests/helpers/factories.ts
@@ -72,15 +72,22 @@ export async function makeYacht(args: {
   portId: string;
   ownerType: 'client' | 'company';
   ownerId: string;
+  name?: string;
+  status?: 'active' | 'retired' | 'sold_away';
+  hullNumber?: string;
+  registration?: string;
   overrides?: Partial<NewYacht>;
 }): Promise<Yacht> {
   const [yacht] = await db
     .insert(yachts)
     .values({
       portId: args.portId,
-      name: args.overrides?.name ?? `Yacht ${Math.random().toString(36).slice(2, 8)}`,
+      name: args.name ?? args.overrides?.name ?? `Yacht ${Math.random().toString(36).slice(2, 8)}`,
       currentOwnerType: args.ownerType,
       currentOwnerId: args.ownerId,
+      ...(args.status !== undefined ? { status: args.status } : {}),
+      ...(args.hullNumber !== undefined ? { hullNumber: args.hullNumber } : {}),
+      ...(args.registration !== undefined ? { registration: args.registration } : {}),
       ...args.overrides,
     })
     .returning();
diff --git a/tests/unit/services/yachts.test.ts b/tests/unit/services/yachts.test.ts
index 3e8ba4f..46b24ee 100644
--- a/tests/unit/services/yachts.test.ts
+++ b/tests/unit/services/yachts.test.ts
@@ -1,6 +1,19 @@
 import { describe, it, expect } from 'vitest';
-import { createYacht, updateYacht, archiveYacht } from '@/lib/services/yachts.service';
-import { makeClient, makePort, makeYacht, makeAuditMeta } from '../../helpers/factories';
+import {
+  createYacht,
+  updateYacht,
+  archiveYacht,
+  listYachts,
+  listYachtsForOwner,
+  autocomplete,
+} from '@/lib/services/yachts.service';
+import {
+  makeClient,
+  makeCompany,
+  makePort,
+  makeYacht,
+  makeAuditMeta,
+} from '../../helpers/factories';
 import { db } from '@/lib/db';
 import { yachts, yachtOwnershipHistory } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
@@ -160,3 +173,188 @@ describe('yachts.service — archiveYacht', () => {
     await expect(archiveYacht(yachtInB.id, portA.id, makeAuditMeta())).rejects.toThrow(/yacht/i);
   });
 });
+
+describe('yachts.service — listYachts', () => {
+  it('is scoped to port (tenant isolation)', async () => {
+    const portA = await makePort();
+    const portB = await makePort();
+    const clientA = await makeClient({ portId: portA.id });
+    const clientB = await makeClient({ portId: portB.id });
+    await makeYacht({ portId: portA.id, ownerType: 'client', ownerId: clientA.id, name: 'In A' });
+    await makeYacht({ portId: portB.id, ownerType: 'client', ownerId: clientB.id, name: 'In B' });
+
+    const result = await listYachts(portA.id, {
+      page: 1,
+      limit: 20,
+      order: 'desc',
+      includeArchived: false,
+    });
+    expect(result.data.some((y) => y.name === 'In A')).toBe(true);
+    expect(result.data.some((y) => y.name === 'In B')).toBe(false);
+  });
+
+  it('filters by ownerType + ownerId', async () => {
+    const port = await makePort();
+    const client = await makeClient({ portId: port.id });
+    const other = await makeClient({ portId: port.id });
+    await makeYacht({ portId: port.id, ownerType: 'client', ownerId: client.id, name: 'Mine' });
+    await makeYacht({ portId: port.id, ownerType: 'client', ownerId: other.id, name: 'Theirs' });
+
+    const result = await listYachts(port.id, {
+      page: 1,
+      limit: 20,
+      order: 'desc',
+      includeArchived: false,
+      ownerType: 'client',
+      ownerId: client.id,
+    });
+    expect(result.data.map((y) => y.name)).toContain('Mine');
+    expect(result.data.map((y) => y.name)).not.toContain('Theirs');
+  });
+
+  it('filters by status', async () => {
+    const port = await makePort();
+    const client = await makeClient({ portId: port.id });
+    await makeYacht({
+      portId: port.id,
+      ownerType: 'client',
+      ownerId: client.id,
+      name: 'Active One',
+      status: 'active',
+    });
+    await makeYacht({
+      portId: port.id,
+      ownerType: 'client',
+      ownerId: client.id,
+      name: 'Retired One',
+      status: 'retired',
+    });
+
+    const result = await listYachts(port.id, {
+      page: 1,
+      limit: 20,
+      order: 'desc',
+      includeArchived: false,
+      status: 'retired',
+    });
+    expect(result.data.map((y) => y.name)).toContain('Retired One');
+    expect(result.data.map((y) => y.name)).not.toContain('Active One');
+  });
+
+  it('searches by name (ILIKE)', async () => {
+    const port = await makePort();
+    const client = await makeClient({ portId: port.id });
+    await makeYacht({
+      portId: port.id,
+      ownerType: 'client',
+      ownerId: client.id,
+      name: 'Sea Breeze',
+    });
+    await makeYacht({
+      portId: port.id,
+      ownerType: 'client',
+      ownerId: client.id,
+      name: 'Wind Dancer',
+    });
+
+    const result = await listYachts(port.id, {
+      page: 1,
+      limit: 20,
+      order: 'desc',
+      includeArchived: false,
+      search: 'breeze',
+    });
+    expect(result.data.map((y) => y.name)).toContain('Sea Breeze');
+    expect(result.data.map((y) => y.name)).not.toContain('Wind Dancer');
+  });
+});
+
+describe('yachts.service — listYachtsForOwner', () => {
+  it('returns all yachts owned by a given client', async () => {
+    const port = await makePort();
+    const client = await makeClient({ portId: port.id });
+    await makeYacht({ portId: port.id, ownerType: 'client', ownerId: client.id, name: 'Y1' });
+    await makeYacht({ portId: port.id, ownerType: 'client', ownerId: client.id, name: 'Y2' });
+
+    const result = await listYachtsForOwner(port.id, 'client', client.id);
+    expect(result.map((y) => y.name).sort()).toEqual(['Y1', 'Y2']);
+  });
+
+  it('returns all yachts owned by a given company', async () => {
+    const port = await makePort();
+    const company = await makeCompany({ portId: port.id });
+    await makeYacht({ portId: port.id, ownerType: 'company', ownerId: company.id, name: 'CY1' });
+
+    const result = await listYachtsForOwner(port.id, 'company', company.id);
+    expect(result.map((y) => y.name)).toEqual(['CY1']);
+  });
+
+  it('is tenant-scoped', async () => {
+    const portA = await makePort();
+    const portB = await makePort();
+    const clientA = await makeClient({ portId: portA.id });
+    await makeYacht({
+      portId: portA.id,
+      ownerType: 'client',
+      ownerId: clientA.id,
+      name: 'Only-A',
+    });
+
+    const result = await listYachtsForOwner(portB.id, 'client', clientA.id);
+    expect(result).toHaveLength(0);
+  });
+});
+
+describe('yachts.service — autocomplete', () => {
+  it('matches by name (ILIKE)', async () => {
+    const port = await makePort();
+    const client = await makeClient({ portId: port.id });
+    await makeYacht({ portId: port.id, ownerType: 'client', ownerId: client.id, name: 'Phoenix' });
+
+    const result = await autocomplete(port.id, 'phoe');
+    expect(result.some((y) => y.name === 'Phoenix')).toBe(true);
+  });
+
+  it('matches by hullNumber or registration', async () => {
+    const port = await makePort();
+    const client = await makeClient({ portId: port.id });
+    await makeYacht({
+      portId: port.id,
+      ownerType: 'client',
+      ownerId: client.id,
+      name: 'Something',
+      hullNumber: 'HULL-ABC-123',
+    });
+
+    const result = await autocomplete(port.id, 'HULL-ABC');
+    expect(result.some((y) => y.hullNumber === 'HULL-ABC-123')).toBe(true);
+  });
+
+  it('is tenant-scoped and caps at 10 results', async () => {
+    const port = await makePort();
+    const other = await makePort();
+    const client = await makeClient({ portId: port.id });
+    const otherClient = await makeClient({ portId: other.id });
+
+    for (let i = 0; i < 12; i++) {
+      await makeYacht({
+        portId: port.id,
+        ownerType: 'client',
+        ownerId: client.id,
+        name: `MatchMe-${i}`,
+      });
+    }
+    await makeYacht({
+      portId: other.id,
+      ownerType: 'client',
+      ownerId: otherClient.id,
+      name: 'MatchMe-other',
+    });
+
+    const result = await autocomplete(port.id, 'matchme');
+    expect(result.length).toBe(10);
+    expect(result.every((y) => y.name.startsWith('MatchMe-') && !y.name.endsWith('-other'))).toBe(
+      true,
+    );
+  });
+});