Mast props are not seen in all of the island groups that use shunting rigs. I have only seen them used in Fiji and Kiribati but find that they can make your shunting rig more foolproof. Some are straight and some are curved to provide some shock absorbancy in the event that the sail goes aback. Without the prop it is possible that the whole rig will fall over onto the ama. This is unlikely to happen with a highly skilled crew but in shifty wind conditions it is a danger.
|A sketch of a Kiribati canoe by Sir Arthur Grimble.|
|A curved prop (rokoroko) on a Fijian camakau.|
|A straight prop on a Fijian Tamanu.|
|Bungy powered shock absorber used on my T2 design.|