Nominal Guns38NNF-1715
NationalityRoyaume de France
OperatorMarine Royale
Keel Laid Down11.1744NNF-1715
First Commissioned7.1745NNF-1715
How acquiredPurpose builtNNF-1715
ShipyardLe Havre - Normandy NNF-1715
ConstructorPierre Chaillé FilsNNF-1715
CategoryFifth RateNNF-1715
National RateTroisième RangNNF-1715
Ship TypeFrigate NNF-1715
Sailing RigShip RiggedNNF-1715
BecomesBritish Fifth Rate frigate 'Ambuscade' (1746) (40)


DimensionMeasurementTypeMetric EquivalentBWAS-1714
Length of Gundeck132' 6"Imperial Feet40.2384 
Length of Keel107' 5 ½"Imperial Feet32.6263 
Breadth36' 0"Imperial Feet10.9728 
Depth in Hold10' 6"Imperial Feet3.2004 
Burthen740 7294Tons BM 
DimensionMeasurementTypeMetric EquivalentNNF-1715
Length of Gundeck122' 9"French Feet (Pied du Roi)39.6367 (130′ 0″ Imperial)
Length of Keel110' 0"French Feet (Pied du Roi)35.728 (117′ 2″ Imperial)
Breadth35' 9"French Feet (Pied du Roi)11.4167 (37′ 5″ Imperial)
Depth in Hold16' 6"French Feet (Pied du Roi)5.2239 (17′ 1″ Imperial)


1745Broadside Weight Unknownref:692
Gun Deck38 French Canons de Fer

7.1745Broadside Weight = 128 French Livre (138.1376 lbs 62.656 kg)NNF-1715
Upper Gun Deck26 French 8-Pounder
Quarterdeck/Forecastle12 French 4-Pounder

Crew Complement

Date# of MenNotesSource
1745450as privateerref:692
7.17451855 officers, 180 menNNF-1715
21.4.1746365 BG

Service History


Loan for privateering ??


Notes on Ship


Admiralty-Office, April 16

Vice-Admiral Martin was forced to put into Plymouth on the 22d Instant, with part of his squadron, which has suffered by bad weather, and has left the remainder at sea. He has brought in with him a French Privateer of 18 guns and 140 men, called Le Chasseur, taken by the Yarmouth. The Defiance, commanded by Captain Powlett, has taken, and sent into Plymouth, a French Man of War, called the Ambuscade of 40 guns, and 365 men. The engagement was on the 21st, and lasted 2 hours, in which the Ambuscade had 26 Men killed and wounded 1 and the Defiance had only 1 man killed and 3 wounded. She is a new ship, and longer by the keel, and as broad on the deck as the Defiance.


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