A most interesting addition to the Instant Thunder line. The emulated show predates me by a good 20 years, but then again, so do a lot of good things.
You may have just inspired me to make yet another variant. I’ve been trying to write a WWII submarine based game for a while now. Re-stating the elements like this has been a god-send. The HS lock sequence based on relative maneuvers works perfectly for emulating submarines using trigonometry and a TDC while Radar locks are good for sonar. The gun guessing game seems right for depth-charges and surface attacks.
This might also be a chance to use the circular plot game board I’ve been thinking of. Rather than 4 rows of 13, try 13 concentric circles divided into quadrants - like a radar/sonar plot screen.