| 
| History | 
|  Canada | 
| Name | Ottawa | 
| Namesake | Ottawa River | 
| Builder | Canadian Vickers, Montreal | 
| Laid down | 8 June 1951 | 
| Launched | 29 April 1953 | 
| Commissioned | 10 November 1956 | 
| Decommissioned | 31 July 1992 | 
| Reclassified | 21 October 1964 (as DDH) | 
| Identification | DDH 229 | 
Honours & awards | Atlantic 1939–45, Normandy 1944, English Channel 1944, Biscay 1944 | 
| Fate | Scrapped in 1994. | 
| Badge | Gules, a bend wavy argent charged with two cotises wavy azure over all a beaver or, the sinister forepaw resting on a log of silver birch proper. | 
| General characteristics | 
| Type | Destroyer escort | 
| Displacement | 
- As DDE:
 
- 2263 tons (normal), 2800 tons (deep load)
 
- As DDH:
 
- 2260 tons (normal), 3051 tons (deep load)
 
  | 
| Length | 366 ft (111.6 m) | 
| Beam | 42 ft (12.8 m) | 
| Draught | 
- As DDE: 13 ft (4.0 m)
 
- As DDH:14 ft (4.3 m)
 
  | 
| Propulsion | 2-shaft English-Electric geared steam turbines, 3 Babcock & Wilcox boilers 22,000 kW (30,000 shp) | 
| Speed | 28.5 knots (52.8 km/h) | 
| Range | 4,570 nautical miles (8,463.6 km) at 12 knots (22.2 km/h) | 
| Complement | 
- As DDE: 249
 
- As DDH: 213 plus 20 aircrew
 
  | 
Sensors & processing systems | 
- As DDE:
 
- 1 × SPS-12 air search radar
 
- 1 × SPS-10B surface search radar
 
- 1 × Sperry Mk.2 navigation radar
 
- 1 × SQS-10 or −11 hull mounted active search and attack sonar
 
- 1 × SQS-501 (Type 162) high frequency bottom profiling sonar
 
- 1 × SQS-502 (Type 170) high frequency Limbo mortar control sonar
 
- 1 × UQC-1B "Gertrude" underwater telephone
 
- 1 × GUNAR (Mk.64 GFCS with 2 on-mount SPG-48 directors)
 
- As DDH:
 
- 1 × SPS-12 air search radar
 
- 1 × SPS-10B surface search radar
 
- 1 × Sperry Mk.2 navigation radar
 
- 1 × URN 20 TACAN radar
 
- 1 × SQS-10 or −11 hull mounted active search and attack sonar
 
- 1 × SQS-501 (Type 162) high frequency bottom profiling sonar
 
- 1 × SQS-502 (Type 170) high frequency Limbo mortar control sonar
 
- 1 × SQS-504 VDS, medium frequency active search (except 233 after 1986)
 
- 1 × UQC-1B "Gertrude" underwater telephone
 
- 1 × GUNAR (Mk.64 GFCS with 1 on-mount SPG-48 director)
 
  | 
Electronic warfare & decoys | 
- As DDE:
 
- 1 × DAU HF/DF (high frequency direction finder)
 
- As DDH:
 
- 1 × WLR 1C radar warning
 
- 1 × UPD 501 radar detection
 
- 1 × SRD 501 HF/DF
 
  | 
| Armament | 
- As DDE:
 
- 2 × 3 in (76 mm) Mk.33 FMC twin mounts guns
 
- 2 × 40 mm "Boffin" single mount guns
 
- 2 × Mk NC 10 Limbo ASW mortars
 
- 2 × single Mk.2 "K-gun" launchers with homing torpedoes
 
- As DDH:
 
- 1 × 3"/50 Mk.33 FMC twin mount gun
 
- 1 × Mk NC 10 Limbo ASW mortar
 
- 2 × triple Mk.32 12.75 inch launchers firing Mk.44 or Mk.46 Mod 5 torpedoes
 
  | 
| Aircraft carried |  | 
| Aviation facilities | 
- As DDH:
 
- 1 × midships helicopter deck with Beartrap and hangar
 
  | 
HMCS Ottawa (DDH 229) was a St. Laurent-class destroyer that served in the Royal Canadian Navy and later the Canadian Forces from 1956 to 1992. Ottawa was the first ship with a bilingual crew in the Canadian navy.