Uh, oops, I only placed two water positions. In order to fit 3 I have to crowd them slightly. Best I can do on a map that isn't wraparound.
Try this arrangement instead. You do NOT need to send out new copies of the map file - players only need the rbg image to play.
Code:
#start 239
-- sea start
#start 286
-- sea start
#start 154
-- sea start
#start 374
#start 22
#start 97
#start 216
#start 207
#start 78
#start 121
#start 304
#start 36
#start 381
#start 400
#start 291
#start 224
#start 148
#start 134
#start 288
#start 42