The helmsman should not execute orders unless what?

The correct answer is that the helmsman should execute orders only when clear instructions are given by the Coxswain. This is because clear communication is essential in maritime operations to ensure safety and effective execution of maneuvers. The Coxswain, as the leader on the boat, is responsible for providing precise directives that the helmsman can act upon. Ambiguity in instructions can lead to errors that might compromise the safety of the vessel and its personnel.

In addition, clear instructions help the helmsman understand the context and the reasoning behind the orders, which is vital for making quick and effective decisions in dynamic conditions. This role becomes especially critical when maneuvering in challenging or emergency situations where precise actions can make a significant difference in outcomes.