In a previous post
Colemj made a distinction between the main strike and the surge component of a lightning
strike to his Manta
40. This observation evolved into a discussion on lightning
grounding that raised some very fundamental questions. Answers are needed but the science is presently lacking.
In three weeks at the NFPA 780 Lightning Protection Technical Committee meeting
the Watercraft Task Group will be discussing grounding in water
via immersed grounding conductors. Since many members of this forum have had first-hand experience with lightning strikes, accounts of your damage can provide exceedingly valuable data to help in this investigation.
Specifically, we are interested in any first-hand objective observations or accounts of physical damage that may relate to the current
flow into the water
. Of particular relevance are any melted or blackened fitting, pitting or blackening on any immersed part such as a ground plate, keel
shaft or strut, rudder
, submerged electrodes,etc., and damage to engine electronics
. A list of damaged, and undamaged, electronics
(transducer, make, model #, if available) is also of interest. Photographs are especially useful. Please include the location where the strike happened. All of these observations will be presented to NFPA and considered by the Watercraft Task Group.