Mircrolight?I had hired a boat with my family for the day. When returning to the harbour we noticed a lime/yellow triangle which at first I thought must have been an microlight. We quickly realised the triangle was too large to be a microlight (60-70 foot wide wingspan) and moved too quickly (perhaps 150 mph).A faint whistling sound accompanied the triangle. The triangle appeared to fly diagonally east and with the back end pointing down.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))