I have hauled lots of light aluminum boats with aircraft as large as a 205/212 using both shortline and longline.
Boats, like light airplanes (ie Super Cub), can be a very dangerous loads.
Proper rigging is essential.
Here's how I do it.
Put the motor and any fuel tanks in the rear of the boat. Then place the boat in a standard cargo net with the transom in about the center of the net. Gather up the net around the boat and run a lanyard from the rings on the four corners of the net up to the bow thence up to the cargo hook. Place a sliding shackle on the lanyard and through the docking tie-ring at the bow of the boat. Pick the load up and go, obviously quite carefully at first. The lanyard sliding through bow shackle allows the net to gather properly around the boat.
I could regularly get at least 50+ knots using this method with zero stability problems.
Last edited by Old Dogs; 19th Jul 2019 at 02:31.