U-Boat Captain: Solitaire WW2 Wargame

From BoardGameGeek:

U-Boat Captain is an Operational-Tactical level board-wargame covering individual German WW2 U-Boat combat. Comes with full rules (19 pages), 6"x 9" map, several U-Boat Displays, 27 counters, with optional rules, several scenarios and campaign games (of various lengths), extensive examples of play, and Designer's Notes. Captain various historical German U-Boats (Type VIIB, VIIC, IXA, IXC) on North Atlantic patrols from 1939 through 1942 and try and achieve the most tonnage sunk you can, without being sunk yourself. Sail to your area of operation and conduct daily patrols/searches. If you have an encounter, decide when/if to attack (watch out for escorts). If you attack, perform the attack sequence and launch torpedoes, or use your deck gun. Can you be a successful U-Boat Captain? Published in Panzerschreck magazine #19