@BUKER,
yes, there is another unit at Penang, patrolling the south entrance. Both units are simple AI-Boats. You can d/l them here at "subsim" (search for "Miner1436"), but the boat is made for SH4 - so you need to convert it to SH3.
@Arael,
yes, these are converted SH4 units. You can find them on the d/l pages of "Molke2005_yamatoforever" or "Trainer1942_Nautilus42". Or scan the FTP server of "plissken04":
ftp://maikhaas.dyndns.org/Volume_1/S...COMMUNITYMODS/
There you'll find most of all converted SH4 units.
Greetings
rowi58