Power cords, like big AC power cords, are pretty robust. But for some laptops with proprietary connections on the power cord...It is better to have a spare cord AND supply, whether that's AC or AC/DC. Cords break, get lost
, get twisted.
One PITA from Lenovo (Thinkpad, ex-IBM) is that every unit comes with an AC-only power adapter. Oh, they MAKE a perfectly good AC/DC unit that can plug
into either AC or DC to be used as a direct DC/DC power adapter, but you can only order it as an accessory, not a replacement for the stock AC adapter.
So that's one more reason to buy a direct DC/DC supply. If it fails, you can always use the old AC supply plugged into an inverter
"How do you actually "navigate" with your GPS
plotter or laptop? What tasks do you typically do?" In cruising mode I don't. My GPS
is an older GPS, no plotting, no intention to upgrade anytime real soon. Well, it will draw a plot but just on a screen with range circles--no mapping. My laptop is just fine, but I prefer not to be bothered by electronics
and would rather it was stowed away in a safe dry place. I'm fine with some paper charts--even printouts from the nav software
sometimes will do.
Then again...the first time I took a boat up through the East River and Hellgate was well after midnight with no charts
at all, just knowing "that's where the big boats go". < g >
OTOH if I'm racing
, I'll lay in course lines on the nav software
to approximate "best course" from point to point. And let the GPS position run on top of that, and make sure there's enough battery
to feed the thing all the time because the GPS plot won't be there if the computer shuts down.
Along the way I'll look at how the course would better be run, ignoring the route
plot in favor of the reality of best wind/current and adjusting for real time, etc. Still, seeing all the information in real time helps to figure things out ahead of time, and especially helps to see if we've been steering
"this way" and the current
has been putting us "that way" making a course correction advisable. (Not just from moment to moment using the GPS display, but looking at the plot to see things like "Gee, every time we get three miles out, the current
hits us, let's make sure we tack before we hit that line next time".
Paper is nice, but sometimes you can play "what if" and factor in more information on the computer. You can also graphically overlay tide/current information, to see what's going to be hitting you hours down the course, depending on where you are. Sometimes that affects the choice of "stay in or go further out?"
I suppose somewhere out there is newer better software that factors in all these things and just issues advisories and orders, too.<G>