I've always interpreted the content of the Navigational Rules COMDTINST M16672.2SD the same as colobear.
Aside from how an individual may interpret the rules, I consider the following:
Even when in times of uninhibited visibility from weather, the design of our C-Dorys alone does not provide with a clear 360 degrees visibility without contorting yourself from the helm to look out past the stern when on plane. (Of course, if you have others on board, you can position a stern lookout). Having a radar on and easily seen at the helm, provides a 360 degree watch that gives you a bit of an edge in collision avoidance.
The radar is just one more tool that if it is installed, functional and used may become the one entity that prevents a collision.
It all boils down to using all means possible to increase your situational awareness.
Sunbeam, I can certainly appreciate your observation of a sailboat's inability to keep the batteries charged while under sail. (At least you have a plausible argument if you were questioned).
These are great discussions for us to explore.
Aside from how an individual may interpret the rules, I consider the following:
Even when in times of uninhibited visibility from weather, the design of our C-Dorys alone does not provide with a clear 360 degrees visibility without contorting yourself from the helm to look out past the stern when on plane. (Of course, if you have others on board, you can position a stern lookout). Having a radar on and easily seen at the helm, provides a 360 degree watch that gives you a bit of an edge in collision avoidance.
The radar is just one more tool that if it is installed, functional and used may become the one entity that prevents a collision.
It all boils down to using all means possible to increase your situational awareness.
Sunbeam, I can certainly appreciate your observation of a sailboat's inability to keep the batteries charged while under sail. (At least you have a plausible argument if you were questioned).
These are great discussions for us to explore.