Mike, sage advice.
The closer I looked, the more damage I found.
After going over the boat with a fine toothed comb (figure of speech)the path of the electricity appears to have been as follows. or the reverse. Struck the Hobie bob pivot, a perfect lightning rod if there ever was one. Down to the comp tip, and down the bolt rope track and maybe inside, where it exploded the comp tip, probably from sudden expansion of heated air/steam. down the shrouds and the mast. Arced from mast base extrusion to front crossbar, arced to a carbon fiber pole (righting pole) that was lashed below the tramp to rear crossbar, arced to center fitting of tiller crossbar, arced into stbd tiller, down pintle and arc to screw in drain plug, maybe to ground from there.
Not done yet, remember the shrouds? there was also an arc path, both port and stbd from shroud adjusters to a fore-aft aluminum tube (custom) between the wing struts. Arcing evidence from rear wing strut to rear cross bar both sides. Also 1/8th in. gelcoat holes inside both hulls about 3 ft fromm the stern. Thought would find damage at centerboard pivot but none evident.
Unfortunately, my insurance co (Boat US) didn't see that all the arcing was from the lightning. They called it "corrosion damage"
. 2001 fresh water boat. Can't recommend Boat US to insure your cat. They did pay for new mast, which was a help, but I thought, as you did Mike, that crossbars, wing struts, and anything else affected should be replaced.
Boat was on the sand when struck. Could not have been a full strike or there would have been more damage. Lucky or unlucky depending on your perspective.
Had a trip planned for several weeks after the strike. Damned if we weren't going to go. Patched the mast back together w epoxy-glass & aluminum tube for bolt rope. 5 days and 235NM over the top of the Michigan mitten
. 4 days upwind with up to 25 kts and steep boat stopping chop. A pretty good stress test, though maybe not the most prudent. Anyway, no leaks or structural failures save a couple of broken strands of 1x19 at the swage.
Guess we'll keep sailing her. I think best protection on this boat would be to provide a better path to ground. Am considering installing a heavy insulated wire from topmast to aluminum section, then from mast base to metal stake in the ground. Should be beneficial under way too. Though I would be interested in other, more informed opinions.
George VS