Not a cariologist, but I have some grasp of electronics
The design of pacemakers has been updated periodically to deal with sources of outside interference
as they have become apparent. Generally they will be shielded against disorganized radio
frequency (RF) of moderate power and organized RF of indeterminate power. Magnetic fields can also be a source of problems. Electrical
radiation and magnetic fields are a fact of life in the modern world and most of the run of the mill stuff you would encounter in your home has been accounted for in the current
pacemaker designs. Most of the stuff on a boat is similar to what is in you house.
The two potential problem sources you might encounter on a boat that you likely wouldn't in your home are radio transmitters with significant power and welders.
An observation I read by an EMT is that they have no concern using their handheld and vehicle mounted radios when transporting patients. To me this strongly supports the position that handheld marine
VHFs shouldn't be a problem.
or Ham might be another thing. The antenna
is further away but radiates a lot more power. If the antenna
is the backstay then it will be radiating at your level within 20' of where you sit to operate the radio. Here is a related link:
I don't see there being any issues with magnetic fields on a boat unless you lean against the alternator
or a generator
Welding on-board or at a shop I would stay away from the welding equipement in operation, they have really big surges of current
which produces associated magnetic fields.
strikes will be a problem in all 3 catagories, but they are a risk wherever you go, on a boat or otherwise.
I can't think of anything else on a boat that would produce a significant electrical
, RF or magnetic surge. There is probably something I haven't thought of.