To determine the minimum distance from a diver-down flag that all vessels in open waterways must attempt to stay, let's consider the standard regulations regarding this rule.
Typically, in many regions, there is a defined distance that vessels need to maintain to ensure the safety of divers. This distance helps to prevent accidents and ensures that vessels do not get too close to areas where divers are present.
Given the options provided:
a) 100 feet
b) 200 feet
c) 300 feet
d) 400 feet
The correct answer to this question, based on standard safety regulations, is that vessels must stay a minimum of 100 feet away from a diver-down flag.
Therefore, the correct option is:
a) 100 feet.
