the condition of road
The standard answer is constant bearing. As soon as a another vessel is sighted at sea, you take a compass bearing on it, and you keep on taking compass bearings. If the bearing does not change, you are on a collision course. If it's on your port side, do nothing. If it's on your starboard side, give way by changing speed or course.
Speed and direction determine velocity
by multiplying its frequency
radar
A safe speed.
Safe speed for the vessel
Traffic Density
Traffic Density
traffic density
Traffic Density
Sea, weather and visibility conditions.
maintaining enough room between you and the vessel ahead to be able to stop or avoid collision
the condition of road
You have enough time to avoid a collision Source: Boat Tennessee-Responsible Boating
Sea, weather and visibility conditions.
Sea, weather and visibility conditions.