Today started with a Lightning Strike

We assisted with repairs on a 58 Southern Cross after a strike.
Cummins ECMs, controls altenators, charge controllers.
Then; ALL electronics, Sat system, anything with a LCD or LED display, All A V stuff and half of the AC equipment.
Later discovered the battery chargers and most of the batteries.
There was nothing left of the two VHF sticks.
Methane explosion in the black water tank.
No damage to the hull.
Insurance company covered everything.

The SS rails on the fly-bridge did polish back to a nice shine.
Just lil pits in the SS rail but owner wanted that left on for his personal reasons.
They were onboard when the strike happened.

Old Cummins Smart Crap replaced with Simrad 7" displays with new CanBus I/O controllers.

Took about a year to fix everything.
Insurance company said; the one year clock started after the last of the original repairs were made and boat delivered.
Insurance company did not drop them after the claim.

Are you out of the water yet?

Now is the time to re-test ALL of your equipment. You may have over looked some things....
I'm sure that mag in the radar took a hit, or at least degraded.

Oh, on that Southern Cross.
Windlass was fine, trim tab pump was fine. The lil wires from the tabs to the dash that offer tab position, they evaporated.

If you took a direct strike, that electricity went to the water on some path thru your boat. The fiberglass may be damaged.
Also, thru hull fittings may be damaged.

I have witnessed hulls where the FRP was just mush, the bottom paint (what was left) and silt clogged the glass strands & mush well enough to keep the hull from sinking.

I agree. You need to haul out to assess the hull and thru hulls. I would inspect every thru hull for any sign of burn marks. You could probably do a short haul in the sling as for a survey. Unless a problem is found.

In the mean time check and run every system incl engines, gens, thrusters etc. if wiring was damaged something may work for a short time until damaged wiring heats up

I surveyed the electrics and electronics on a yacht in Ixtapa that had been struck by a side-flash. The yacht in the next slip was the primary hit. Everything in the yacht that had a semi-conductor in it was inoperable. There was a hand-held Magellan GPS in a drawer with no batteries in it that would not power up with fresh batteries. The captain was certain it functioned previously. There was a power supply for the hydraulic pack that lifted hatches that was very simple. It was a transformer with one diode in a metal enclosure, and the diode was damaged. Windlass AC control wouldn't work. Replaced the contactor, and good again. Most, if not all, of the damage was from EMF.
https://www.qwant.com/?client=brz-vivaldi&q=emf+from+lightning&t=web

EMF is a factor that can effect devices a few hundred feet (or more) of a direct strike.
Also lil streamers can stretch out and create mini paths from & TO the main lightning bolt.
dewald states his VHF stick was hit. If there is anything left of it, it may have been a EMF wave or lil streamer spike that hit him.

Because, were all still guessing as to how hot the hit was, I'm still concerned about everything including the hull. Boat out of the water yet? Proper surveyor looking her over yet?

On that bad hit I mentioned above, The insurance company sent out their own tech that worked with the owners surveyor very well. After discovering an issue with the integral black tank, it was pumped out and cleaned for a more through examination.

I really hope dewald's insurance company steps up and checks everything for Him.

Southeastern just dropped a new 24Kbtu self contained AC unit on me.
No damages to the box.

Yes, Now it is cocktail time.