What means of emergency escape from a shaft tunnel are provided?

Correct Answer: Option A — Two means of escape are provided, one which is a sliding watertight door at the forward end of the tunnel and the other a ladder and watertight trunk at the aft end of the tunnel.

Shaft tunnels must provide two independent means of escape to ensure personnel safety. A sliding watertight door provides access to the machinery space forward, while a ladder leading to a watertight trunk at the aft end provides a secondary exit, preventing entrapment during flooding or emergencies.