I like CaptnForce’s separate Engineering Log… very simple and practical check list of maintaining boat systems with details of repairs
on the left side and I imagine reminder notes for what hours to do the next oil
For the DECK
log, while I appreciate Orissails sensible forethought in battery
back up nav systems.
The most important LOG factor for me is to always
have a standard magnetic compass
reference in case all
electronic navigation is destroyed by fire or the effects of putting out a serious fire. (This has actually happened to me halfway between Japan and Seattle in the height of a Gale, where it took 2 days to jury rig safe wiring and repairs so as to get back bridge steering and back up systems on line.)
Dead Reckoning (DR) is the sailor’s basic survival navigational tool and the irony of today’s bridge full of electronics is that the standard magnetic compass
, tends to suck hind tit when it comes to installation
and reliable calibration with all the power lines running beside it (variable off and on?)
So you have to make the most of it.
That is why my Deck log always shows underway these hourly Heading Notations.
(plus SOG/COG from the GPS)
:….. to next waypoint (WP is always written in the Log)
:….. what the flux/gyro or whatever electronic compass is reading
:……. What the autopilot
is set at to keep us on track for those logged conditions. (often the autopilot will have it’s own electronic compass
:… I log what my DR magnetic compass is reading for those electronic field conditions, which gives me that emergency
backup and a much better awareness of whether this compass is affected by Radar/Stereo…etc.
My point being, when you have a major emergency
and systems all crash, navigational security
will be more dependant on the quality of your hourly record
keeping and awareness, rather than bits of possibly compromised (redundant) hardware
This way you can focus on dealing with the emergency repairs rather than guessing where you are because of poor record