Nope, looks good to me, Crash
Another thing I've found helpful with choppers is giving them no
Fuel till the trigger activates so they cant just wander on thru their WP's.
Like so:
this SetFuel 0In the INIT. line of your chopper (or WP)
And then:
ChopperName SetFuel 1In the On Activation line of your trigger
Of course, you'd want to choose
NONE rather than
FLYING in the Special Category of your unit, else it will be eating dirt soon after the game starts. :-X
If you want your choppers to come from over water, you could use this scenario and just have them stationed on an Island or remote place on the map and WP them to come in where you want.
Also, you could use the
setpos command to place the choppers at sea when your trigger activates.