Complete the practice.

Complete the practice using only torpedoes.

Complete the practice using only the deck gun.

Complete the first Convoy Action.

Complete the second Convoy Action.

Complete the third Convoy Action.

Complete the fourth Convoy Action.

Complete the fifth Convoy Action.

Complete the sixth Convoy Action.

Complete the first Convoy Action with an overall difficulty level of 9.

Complete the second Convoy Action with an overall difficulty level of 9.

Complete the third Convoy Action with an overall difficulty level of 9.

Complete the fourth Convoy Action with an overall difficulty level of 9.

Complete the fifth Convoy Action with an overall difficulty level of 9.

Complete the sixth Convoy Action with an overall difficulty level of 9.

Get a rank of Lieutenant JG.

Get a rank of Lieutenant.

Get a rank of Lieutenant Commander.

Get a rank of Commander.

Get a rank of Captain.

Get a rank of Vice Admiral.

Get a rank of Admiral.

Get a rank of Fleet Admiral.

Get a rank of WGSC.

Get a rank of WGSC, class 1.

Beat the highscore (39300 tons) in the first War Patrol.

Beat the highscore (39300 tons) in the second War Patrol.

Beat the highscore (39300 tons) in the third War Patrol.

Beat the highscore (39300 tons) in the fourth War Patrol.

Beat the highscore (39300 tons) in the fifth War Patrol.

Spend the night aboard.

Basic Morse.