It would be nice for them to be able to designate a specific target, instead of whichever is closest\spotted first.

The Naval Mine (Bottom) seems to be working fine for me, can you test again to be sure.

EDIT: After further testing the Bottom mine only damages vehicles\divers under the water, boats do not get damaged.

Still broken and I think I know what is wrong.

In "fn_spawnGroup" it uses (on line 53)

if (_charsType == (typeName 0)) then
{
//Only a count was given, so ask this function for a good composition.
_types = [_side, _chars] call BIS_fnc_returnGroupComposition;
}

When deciding the units that will makeup the group

Looking into "fn_returnGroupComposition" all the units defined are A2 + OA units, eg. "USMC_Soldier_TL" or "TK_Soldier_SL_EP1" instead of the appropriate Arma 3 unit classnames