Medium/Large boats can't be placed to near the docks

[Tom P]

Medium/Large boats and static object boats can't be placed near the docks at Tinian and Saipan islands due to insufficient depth. Only the "harbor tug" and "boat armed Hi-speed" can be placed next to the dock. 

I can place a CVN in the Apra Harbor Naval Reservation, and place a LHA next to the docks in the Apra Harbor. 

[Annapolis81]

Ran into this problem last year.  The mission editor does not take depth into account, but the game does.  The only solution I have found so far is one of "trial and error".  This is true of all of the maps.  Hope that helps.