Thanks for all the comments. It is important to pool and disseminate this info since the game manual is so sparse on these essential details.
There have been many threads on whether map contacts "on" or "off" is more realistic, since one gives you too much info and the other too little. Since it is a single player game, I view this as being simply a matter of personal taste.
The most that can be said is that map contacts "off" is more work, more difficult, but ultimately more satisfying when you get a kill.
The only obstacle in using map contacts "off" in the present state of the game is the lack of info on how to properly use the stadimeter. Measuring from the waterline to the top of the mast as in stock SH4 gives you the wrong range in SH5. In some cases, the top of the funnel gives you the correct range, sometimes its the bridge deck. Hopefully, this issue will be resolved soon.
Ultimately, as we become more familiar with the game, we can do as the real
Kaleuns did and shoot by "eye".
