On Sep 18, 7:39 pm, "Wilbur Hubbard"
wrote:
wrote in message

...
: If someone has unlimited electrical power, is he likely to keep his
: Radar on all the time when he is far offshore? Offshore, far from
: anything else with a functioning radar system, what would prevent
: someone from detecting a sailboat before a collision. Assume clear
: weather.

Stupid question, I'm afraid. This is from the 72 COLREGS

INTERNATIONAL-
Steering and Sailing Rules
RULE 7
Risk of Collision
(a) Every vessel shall use all available means appropriate to the prevailing
circumstances and conditions to determine if risk of collision exists. If
there
is any doubt such risk shall be deemed to exist.
(b) Proper use shall be made of radar equipment if fitted and operational,
including long-range scanning to obtain early warning of risk of collision
and
radar plotting or equivalent systematic observation of detected objects.

In clear language if you have operational radar it must be used when
underway.

I hope this helps.

Wilbur Hubbard

Wilbur, you are a dumbass. I asked because this did happen. The
question is why it happened.
Would someone far offshore turn off his radar if he had unlimited
power?
What would keep a radar from seeing an approaching sailboat. The
sailboat had right of way but neither vessel had a lookout. The boat
with radar may or may not have had it on. Weather was clear and seas
were said to be 4-6'.
Related question, if the person(s) on the radar equipped boat had his
radar on and it gave an indication of a target on a specific bearing
but every time the person looked outside he did not see anything,
would he maybe think his radar was malfunctioning and ignore it
I see from ads that radars have different modes for "offshore",
"nearshore", "harbor". What do these modes do?