Does too much fantasizing about the electronics future make you too want to jump back to the practical? Well, how about cable ties! I've used several hundred of them in the last six months, and cut a hundred more, and have some opinions. For one thing, I'm grateful to the Cobra cable tie company for sending me samples of their unique low profile design, because it works great. The material and ratchet mechanism are strong, they look tidier than regular ties, and -- most important, I think -- you, or someone working on your boat at a later date, will not cut their hand on a sharp plastic snag. You can tighten and trim Cobra ties OK with a wire cutter, but that Eclipse tool works slick (and slightly better than the Ancor version I already had, in my opinion). Cobra ties cost a bit more and don't seem widely distributed, but the company sells direct (though penny pinchers may want to go elsewhere for the tighten/trim tool). I also like hook and loop ties...
It's easy to understand why the Newport Boat Show judges chose the EFOY fuel cell as Best New Product (even given an interesting group of nominees). Those boxes above can automatically charge a boat's batteries at 600, 1200, 1,600, or even 2,200 watts, depending on model, using just a modest amount of methanol, while apparently emitting just a little noise and damp carbon dioxide gas. But do they make sense on the practical level?
NMEA 2000 has been working well on Gizmo this summer, making it easy to get heading, wind, depth, GPS, and more to all the MFD systems I've been testing. AIS over N2K has some issues, but then again the Garmin VHF 200 is good evidence of what's possible. However, I've just begun to explore how NMEA 2000 can integrate Gizmo's engine, tanks, batteries, and other non-navigational systems. A few weeks ago, for instance, I plugged an Albatross demo case into the boat's backbone to see how data from those three Analog Adaptors above would display...
Bert van den Berg, proprietor of Cruz Pro, writes that "Once every few weeks or so we get an instrument back or get a call from someone who says one of our instruments is acting erratically. Almost invariably it ends up that the customer (or worse, their electrical installer) has done something dumb and wired it so that the instrument is susceptible to voltage transients. For this reason I have written an article to help show how electronic installers would wire electronics into a boat as opposed to how many electrical installers wire electronics into a boat...Please have a look and let me know what you think."
Something I was very pleased to find on the ever more likely future Gizmo is extensive documentation on its DC and AC wiring. In that fairly random sampling above you can see a conceptual diagram of major systems, detailed panel flow charts and layouts, and -- most impressive, really -- a hand drawn schematic made when a second 30 amp shore power input was added sometime in the boat's relatively short history. There's much more, including cable by cable wire chase assignments and voltage drop calculations, and most of those cables are physically labeled. Thank goodness, as this is the aspect of the yacht I'm the dumbest about. I won't feel like Gizmo's truly able master until I better understand her electrical systems, and what to do when troubles arise. Plus, despite being thoughtfully and carefully put together in 2000, there's so much useful electrical and electronic updating that could be done in 2009...
Like so many CruzPro instruments, the CS-60 fits a 54mm hole, comes round or square, and has a three-button interface (with a surprisingly deep menu structure behind it). But what's a "Clocked Switch"? Actually that "gauge" contains four solid state switches each capable of handling a load up to four amps and each programmable to its internal clock in two ways...
Zounds! When we last checked in on Steve Roberts, he was installing a Simrad AP20 with a rudimentary NMEA 2000 network, and waiting on a Furuno NN3D MFD12. It was pretty standard stuff for a guy who's into "geek expressionism, gonzo engineering, gizmological expeditions, and applied technomadics." Well, check out Steve's current vision of the network that will eventually reside on his 44-foot steel pilothouse cutter Nomadness. I think he changed his mind on the Furuno -- too bulky for his helm -- and is still undecided on the plotter/radar front, but, wow, has he been thinking about communications and system monitoring/control. Steve explains the whole diagram here, but let me just add that all those nodes lower right are based the interesting open source Arduino I/O project...
Lest you think I'm just about big diesels, check out the good Annie G.'s auxiliary propulsion power system. Years ago I bought the cheapest Minnkoda electric trolling motor I could find (visible on Annie here) and moved the control switch to that battery box where the 'custom' wooden shift/throttle gives me five speeds in forward and three in reverse. None exactly makes the 18' iron-keeled sloop jump, but the rig is handy for getting into the Camden Inner Harbor slip I often use. But I always had a problem knowing if I had enough charge to use the motor as needed. That was neatly solved last summer with the addition of that solar panel and most especially the Argus Analyzer Battery Bug...
I think I got this diagram right, and I think it's important to understand if your boat might end up with more than a few NMEA 2000 powered devices on its network. As discussed on Monday, the popular 'light' (or Micro) size NMEA cables only contain 22 AWG power (and data) wires. Its well insulated power wires are apparently perfectly safe (despite some internecine standards organization hubbub on that score) but they simply can not carry much DC juice very far. Electrical resistance is dependent on wire size -- DC especially so (hence the fascinating "War of Currents") -- and the few DC wire tables that even include 22 guage don't look good. Which is why some manuals, like Garmin's below, go to some trouble regarding powertap placement...
Sigh, that's my first NMEA 2000 network, circa Spring 2005, when there wasn't much more than Maretron to hang on it, and not many boaters were interested anyway. Now many more N2K devices have joined these on the lab's snaking backbone (and there are many others I'd like to try), N2K is an active topic on Panbo forums and elsewhere, and the network for my maybe-new Gizmo boat is going to be a serious undertaking. The Standard has come a long way, and methinks it's time to reveal a little drama that went down along the way. Yes, those gray Micro cables and the yellow powertap did incur drama, even soap opera...
