Here is the full list of all 23 Pair of Aces achievements.
Sink a ship with no extra holes in the hull
Sink a ship without dropping a single bomb
Sink a ship without shooting an enemy plane
Sink a ship without shooting an enemy plane, and without using the sea-mine
Sink a ship hitting only hull tiles (no superstructure destroyed)
Sink a ship as it is escaping
Sink a ship in less than 30 seconds
Sink the submarine on its first pass
Get 10K points in a single game without losing a plane
Get 50K points in a single game wihout losing a plane
Get 100K points in a single game without losing a plane
Get 200K points in a single game
Get 500K points in a single game
Get 1M points in a single game
Sink all ships in 1 convoy in a single game
Sink all ships in 3 convoys in a single game
Sink all ships in 5 convoys in a single game
Sink 100 ships total.
Sink 500 ships total.
Fail to sink a single ship.
Sink a ship without losing a single plane
Collect 500 powerups
Collect 100 powerups