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Second World War
Battle of the Atlantic  - Weapons and Technology

Combatants in the battle of the Atlantic relied on weapons and technology to attack the enemy, to defend themselves, to communicate, and to rescue friends and foes.

Taffrail Log
Taffrail Log

This device, named after the taffrail (the rail around the stern of a ship) measures the distance a vessel has travelled through the water.

The log worked by trailing a spinner (also called a "fish") in the water behind the ship. The ship's motion through the water caused the spinner to rotate, driving a mechanism that calculated how far the ship had travelled and indicated the results on a dial. Other versions of taffrail logs measured a ship's speed rather than the distance travelled.

Traffrail Log
CWM 19660074-009





4-inch Naval Gun and Mounting
.5-inch Vickers Mk III Heavy Machine-gun
"Pom-Pom" Anti-Aircraft Gun, HMCS Kamloops
Anti-Aircraft Gun and Crew in Action
Depth Charge and Thrower
Hedgehog Anti-submarine Projectile
Squid Anti-submarine Mortar
"Squid Explosion", HMCS Copper Cliff
ASDIC Hut
Protection
Medium Frequency Direction Finding Loop
Binnacle, HMCS Swansea
Gyroscopic Compass
Sextant
Taffrail Log
Wheel House
Fueling Mid Atlantic
German Signal Lamp
W/T Operator and Messenger
"Mae West" Life Belts, HMCS St. Laurent
Royal Canadian Navy Life Vest
Royal Canadian Navy Lifeboat Bailer
Lee-Enfield Line-throwing Rifle