We here is my 2p's worth
Input from 2 people, myself and another eng at work who trained as a marine radio & radar officer at Fleetwood.
The vertical beam width on most small boat radars is about 25 Deg, so you need this you need this to work out if you in the target area.
When I asked Lee what he thought, his reply was "im not going near a active radar, 1.5Kw or not!!" Even though the pulses are very short they are very repetative and of quite a high power.
I have considered fitting a radar and have come up with the following
a) I wont fit it unless all persons, when seated or stood are clear of the theretical beam width.
b) I considered fitting a higher mount to acheive this but it gets quite high and the G forces etc would be greater the higher it got.
c) I have considered angling the radome up at the front so the front beam is almost level, whlile this would decrease the range a bit would help keep the beam over peoples heads.
Anyway at present i am leaving radar, I belive it only usefull in poor vis, so we will just try and avoid poor vis (Thats done it,its months of fog now
) and dont belive the possible risks are clear enough to just give it a go
Also regarding Stuarts post, I belive the RIB needs to underway when you workout whats level as some RIB's mine included sit level underway but very stern down when stopped. But also be aware if it that bad to need radar you wont be doing 40Kts, well maybe not.