If you're playing through the NES adaptation of The Hunt for Red October for some reason, you might start thinking to yourself, "Gee, I wish there was some way I could make this game easier". And if you were, today's your lucky day.
First, crash your subs into the landscape until you run out, which sounds counterintuitive, I know. But when you crash your last one, and before the screen tells you "Game Over", pause the game.
Then while it's paused, grab Controller 1 and press
A, B, Select, Right, Left, Left, Right, Select, B, A, B, B, A
Under normal circumstances, that is your single-use Level Skip code, but since we're out of ships, the circumstances change and instead, you're given a full complement of submarines! How many? Well, the counter rockets up to "I5" if that tells you anything
Which means you can play this game until you finish it or you're absolutely sick of it. Win-win!