Whitecap Invisible Positive Transom Ladder Whitecap positive transom ladders feature a slam latch release mechanism with a tapered design to ensure a secure lock when not in use. The anodized aluminum mounting plate combined with the plastic contact to eliminate metal on metal contact helps provide excellent corrosion protection. The guide plate and strengthened inner tube helps prevent damage during installation and keep the ladder in place when not in use. This ladder comes in 3 and 4 step opt