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marvin4239



Joined: 06 Feb 2007
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PostPosted: Sun Nov 30, 2008 1:21 pm    Post subject: Anchor Light reflection Reply with quote

Yesterday I went to the Christmas boat show on the St John's in downtown Jacksonville (pics in album). I had a 25 mile cruise back home in the dark and it was pitch black. I noticed a really annoying reflection from my anchor light on my deck and railings. I think this has been discussed before but can't seem to find the link. I seem to remember someone fabricating some sort of diffuser on the anchor light to prevent the reflection. Does anyone remember this discussion or what have you done to eliminate the reflection short of moving the light to the rear of the cabin.
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Chester



Joined: 04 Sep 2006
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PostPosted: Sun Nov 30, 2008 2:28 pm    Post subject: Reply with quote

Perko has a disc that mounts on the light pole just under the light to address this situation. I have no experience with the product, just saw it on their website. It shouldn't be too hard to mock one up using materials on hand just to see if it might work.
Some people put foam water pipe insulation on the rails to kill the reflection.
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Alyssa Jean



Joined: 02 Nov 2003
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PostPosted: Sun Nov 30, 2008 5:54 pm    Post subject: Reply with quote

You could take the lid from a 5 gallon plastic pail and cut the rim off with a bandsaw, drill a hole of the appropriate size in the center and play with that to see if it will do the trick.
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marvin4239



Joined: 06 Feb 2007
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PostPosted: Sun Nov 30, 2008 6:05 pm    Post subject: Reply with quote

Anna Leigh wrote:
You could take the lid from a 5 gallon plastic pail and cut the rim off with a bandsaw, drill a hole of the appropriate size in the center and play with that to see if it will do the trick.


Thats sort of what I had in mind but I thought someone had already done something similiar but can't remember what they used.

This is the post I remember reading...

One thing that helped tremendously with night running (which I avoid as much as possible) was making a light shield for the all around light to shade the fore-deck. I used cardboard cereal boxes for cut-and-try sizes until I got full shading of the deck and handrails and made the permanent one from natural gas or propane flue pipe; it is a thin aluminum that can be cut with scissors (not the admirals sewing scissors, please). To mount it I cut a hole the size of the spigot on the plastic lens and simply slip it on the lens and screw it all back onto the light fixture (which is an extra long one from Perko to get above canoes or kayaks I have on a roof rack I made).
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JamesTXSD



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PostPosted: Sun Nov 30, 2008 8:18 pm    Post subject: Reply with quote

Our anchor light is at the rear of the cabintop, on a mast that reaches above the radar - no problem with reflection on the bow rail or forward deck. One thing to keep in mind if you make any kind of light-block: be sure that your light can be seen from up close, all around near the boat... you don't want someone to whack into you at anchor because they came by close up in a dinghy and couldn't see the light because of the shade.

Best wishes,
Jim B.
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marvin4239



Joined: 06 Feb 2007
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PostPosted: Sat Dec 06, 2008 8:42 am    Post subject: Reply with quote

On follow up I cut a 4" disk from some scrap aluminum with a hole the size of the base of the light in the center then removed the globe and put the disk on held in place by the globe. It's just enough to eliminate the glare and not enough to block the light as Jim mentioned. Now I'm working on a way to block the glare from my chart plotter.
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Chester



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PostPosted: Sat Dec 06, 2008 11:02 am    Post subject: Reply with quote

One way to 'dim' the chart plotter is to find a thin, dark plastic waste basket liner and lay one layer over the screen.
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Wandering Sagebrush



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PostPosted: Sat Dec 06, 2008 11:33 am    Post subject: Chart Plotter Reply with quote

We throw a towel over the display when we don't want to mess with the brightness adjustments.
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journey on



Joined: 03 Mar 2005
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PostPosted: Sat Dec 06, 2008 12:40 pm    Post subject: Reply with quote

As Wandering Sagebrush mentions, chart plotters have a brightness adjustment, usually with a night setting. If you're cruising at night, I'd think that chart plotter/radar info would be most helpful, and I'd find the night level. This is red on the JRC we use.

Boris
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marvin4239



Joined: 06 Feb 2007
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PostPosted: Sat Dec 06, 2008 3:11 pm    Post subject: Reply with quote

My chart plotter Humminbird 797 doesn't have a night or brightness setting so the trash bag trick sounds good thanks.
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JamesTXSD



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PostPosted: Sat Dec 06, 2008 3:38 pm    Post subject: Reply with quote

Marvin,

We seem to be getting a slight glare, too, now that you mention it...



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marvin4239



Joined: 06 Feb 2007
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PostPosted: Sat Dec 06, 2008 5:05 pm    Post subject: Reply with quote

JamesTXSD wrote:
Marvin,

We seem to be getting a slight glare, too, now that you mention it...



Xmas Naughty


Jim I was going to ask how you ever see it looks great.
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Wandering Sagebrush



Joined: 21 Jan 2005
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PostPosted: Sat Dec 06, 2008 7:17 pm    Post subject: Humminbird Reply with quote

Marvin,

I should have sent you my 757. It had a bad display and was so dim that you couldn't see it if there was any outside light.

On the 757, and I suspect that your 797 is the same, hit your power switch after you turn it on. It should pop up a display that you then adjust using the left and right arrows on the rocker switch. Left to dim, Right b bright.

Let me know if that works.

Kind Regards,

Steve
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marvin4239



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PostPosted: Sat Dec 06, 2008 7:38 pm    Post subject: Reply with quote

Thanks Steve I'll try that tommorrow couldn't find anything in the manual and the Humminbird help line didn't know.
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HIGH TIME



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PostPosted: Sun Dec 07, 2008 10:20 am    Post subject: Reply with quote

Milehog wrote:
Perko has a disc that mounts on the light pole just under the light to address this situation. I have no experience with the product, just saw it on their website. It shouldn't be too hard to mock one up using materials on hand just to see if it might work.
Some people put foam water pipe insulation on the rails to kill the reflection.
Perko # 1192DPOBLK ... West Marine part # 192411 ... $12.99 ... Shields the light, but not completely.
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