Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Promo Options:
NumPad7: Super Speed

Trainer Options:

NumPad1: Infinite Ship Health
NumPad2: Infinite Ship Fuel
NumPad3: Unlimited Rations
NumPad4: Unlimited Bombs
NumPad5: Unlimited Torpedo Bombs
NumPad6: Unlimited Depth Bombs
NumPad7: Super Speed
NumPad8: Change War Bonds By 5000
NumPad9: Unlock All Ships
NumPad0: Instant Ship Build

Editor Options:
Misc: War Bonds

Notes:

Infinite Ship Health: Deactivate this option when you have to destroy neutral ships (tutorial).