Ladder extension when viewed from behind the boat. Notice the four way PVC fittings at the top and bottom of the ladder. These allow rapid draining of water when stowing the extension and also rapid sinking when deployed.
SIDE VIEW: Notice how the extension lifts away from the rudder. The ladder extension only contacts rudder when a person is on it. The rudder keeps the extension vertical when boarding. Instead of slipping under the hull.
Ladder extension in stowed position.