Periscope or camera to inspect prop / underside of hull

I have the Bosch UniversalInspect (£90) which has a longish cable and built-in screen. So far I’ve only used it to view awkward spaces in the boat and inside the thru-hulls, but the cable and camera head are rated IP67 and described in the manual as waterproof. Should be good enough for basic underwater inspection tasks.
 
I have the Bosch UniversalInspect (£90) which has a longish cable and built-in screen. So far I’ve only used it to view awkward spaces in the boat and inside the thru-hulls, but the cable and camera head are rated IP67 and described in the manual as waterproof. Should be good enough for basic underwater inspection tasks.

Looks good ... but only 95cm cable .....
 
How about using your phone? Many are water resistant
Pop it in a waterproof bag, cable tie it to your boat hook, 4k high quality video thats streamable.
 
I have a viewing tube made out of 4" plastic drain pipe with a thick perspex circular glass clamped in at one end. I t is great for looking at the prop. It is just over a metre long which is fine for a Centaur.
Straight tube? Or mirrors to counter any bend ?
 
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