The Offshore Voyaging Reference Site

Great Borescope

How we knew what the problem is in our mast way out of sight:

Black and white messenger is for the main halyard. Deflection is clear. Sheave to left.

Make sure you get this one with the longer focal length.

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Will Kirkness

A good tradesperson would never, ever leave a burr or sharp edge on a cut. Even if it will never be seen again.

Reed Erskine

I got this 33 ft. endoscope to sort out two lost messengers inside the 50 ft. mast on my J42 while it was out for the installation of new rod rigging. The inside of a mast is the most inaccessible place on a boat, but there’s a lot going on in there, and a snag or tangle of a wire, or even a light messenger with the five internal halyards could be disastrous. Working with the scope and iPhone screen was not easy, but time and patience allows a comforting familiarity with, and control of, the dark mysteries within the mast.