The program was written in BASIC, so I went into the code and did some looking...found the routines that controlled those rates and changed them.
I was then able to sink the Soryu, Akagi, Kaga and Hiryu quickly and steam down to the Southwest and sink the smaller Zuiho...the carrier escorting the troop transports. A total wipeout. Very satisfying.
Very clever.😉👍