The convoy system, a group of ships sailing together for protection.
Hit the enemy ship
The new use of sonar, air escorts, specially designed rescue ships, and voice radio communications permitted convoys to be more easily coordinated
Shoot down the stragglers, they don't have a chance
It was designed to help protect cargo in passenger ships during the First and Second World War.
New German tactics of marshalling U-boats into “wolf packs” of 8 or even 20 submarines that would intercept convoys and attack them at night.
The effectiveness of the convoy system during the Battle of the Atlantic can be seen in the fact that of the approximately 2,700 Allied and neutral merchant vessels sunk by submarines, less than 30 percent were torpedoed while sailing in convoy, 60 percent were unescorted, and the rest were stragglers from convoys.
The convoys are too protected captain
From 1943, when the convoy system became fully operational, only 1,452 Allied and neutral ships were lost.