noun
rope ladder; jack ladder; ratline
A ladder made of rope, often used on ships, for climbing, or in emergency situations. 綱梯子 is the standard term; 'jack ladder' and 'ratline' are nautical variants.
船の横に綱梯子がかかっていた。
A rope ladder was hanging from the side of the ship.
消防士は綱梯子を使って窓から脱出した。
The firefighter escaped through the window using a rope ladder.