Cruising Sailors Forum Archive

There are strikes and there are stikes...

I agree that a stove offers little protection. Maybe if it was made from 1" thick mu metal and sealed with copper foil.

The strike you describe as catastrophic seems like it was not. While I was moored in Salem, a strike hit a IP30 something, every piece of electric equipment on board was fried, including the high current switches (whether they were on or off).

We all decide what risks to take and which it try to mitigate. You can navigate without charts, compass, sextant, or pretty much anything else except your wits.

The main reason I continue to buy printed charts is to get a big picture. A printed chart is like a 32" wide Retina display. You get to see a large area, your eye and brain are very good at zooming in on the areas of interest, which are displayed in very fine detail. Zoom an electronic chart out to display the same area, and most detail is lost. Zooming in to display the same detail, the context is lost. Note that a 60" HDTV display will not solve this problem, the resolution is only 50 DPI or so compared with at least 400 or 500 on lithography. This has cost the lives of more that a few sailors. The recent incident of an experienced Southern California crew driving their boat directly onto the rocks on an isolated island is most likely an example. Didn't show up on the chart plotter when they set the autopilot course.

This makes me wonder actually, why electronic chart software does not have terrain collision avoidance warnings (maybe some do?). This is quite common even in cheap (meaning free) aircraft navigational software. So when you set a route between two waypoints - and a hazard exists within X feet or miles or depth of the route leg - you are warned to take a closer look. On the glider software I run on my iPhone, it will plot the course, then place a big red X where I will impact the terrain, even if the zoom level has eliminated most of the other detail.

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