18″ radome testing, part 1
“The fog was so thick that…” is a popular line here on the coast of Maine, especially this summer. Well, it was so foggy yesterday morning that we didn’t actually see this can buoy until it was just a little over a boat length ahead, and, yes, as the photo suggests, it was so glassy gray calm that fog and Bay blended into blank oneness. But the amazing thing, I thought, was that the new Raymarine Digital 18″ radome I’m testing captured this can about 3/4’s of a mile away and held it tight and clear almost right to that boat length visibility distance. These are great days for real radar testing…
Below, click to enlarge, is Gizmo’s upper helm last Saturday, before we began our week-long “research” cruise (a shout out to my sweeeet wife Andrea is due here). You can see that the Broadband Radar connected to the Simrad NX45 is at 400′ range and resolving Camden Inner Harbor quite well (it did even better close in when mounted much lower on Li’l Gizmo)…
I’ve learned to expect that near range performance from the BR24, but was pleasantly surprised when I turned on the Ray dome. It did darn well at its minimum 1/8th mile range, and, as noted above, has been keeping that promise in real underway use. Has anyone seen another 18″ magnetron radar resolve this well close in? More photos will be coming, including results from a Garmin 18HD, which is on the boat but not yet swapped on the mast.
Another little surprise was that the BR24 imagery went completely whack when I turned on the Raymarine dome, mounted about a foot below it, and it’s also getting occasional interference spokes from nearby vessel’s scanners. The former means I can’t run both radars at once, but the latter is just a little annoyance. Plus there may be a BR interference adjustment I haven’t found yet. The Ray dome, on the other hand, takes 70 seconds to achieve standby status and when running sometimes interferes with the GPS reception of the PB200, mounted in its beam (doh!) about 4′ away. Going foggy island hiking today…more soon.
18″ radome testing, part 2
August 12, 2009
Navico Broadband Radar, beta demo
February 11, 2009
Navico Broadband Radar 3G, better range & lower cost!
April 25, 2011
Nobeltec’s InSight Radar 2
July 12, 2004