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Old 04-26-2017, 07:40 AM   #1
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On deck motion sensor

I am looking for a good solution for turning on my spreader lights if someone comes aboard at night. I have found some 12v motion sensors listed on Amazon, as well as one RV self-contained LED fixture. Has anyone found a good durable sensor or fixture that they are happy with? The ones I looked at have so-so reviews.
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Old 04-26-2017, 07:47 AM   #2
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This is something I would never think of since a boat is always in motion. If I'm on the boat when someone boards that is not welcome, that is not a problem. If I'm not, take what you want, it's insured.
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Old 04-26-2017, 07:53 AM   #3
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I recall someone (on this forum or CF) stating they used a pressure-sensing mat to trigger their lighting. Is the egress pathway on your vessel limited enough to consider that?
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Old 04-26-2017, 08:04 AM   #4
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I'm looking for a security solution to cover the aft end of the boat. We have had some expensive things stolen, and my wife would feel better if we had the lights while at anchor. I could hook it up to an alarm as well. The motion detector works off of IR (heat) from a large body, so boat motion not a factor.
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Old 04-26-2017, 08:17 AM   #5
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The best solution that will be trouble free is a set of 12VDC photo beam detectors.
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Old 04-26-2017, 08:39 AM   #6
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Why not to use standard alarm motion sensor? They are cheap and when motion is detected you can do whatever you want, trigger an alarm or trigger a light is the same.

Like mentioned by Pgitug, photo beam are also a solution depending on what you want to do.

L.
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Old 04-26-2017, 08:42 AM   #7
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Quote:
Originally Posted by mike66 View Post
I'm looking for a security solution to cover the aft end of the boat. We have had some expensive things stolen, and my wife would feel better if we had the lights while at anchor. I could hook it up to an alarm as well. The motion detector works off of IR (heat) from a large body, so boat motion not a factor.
I have gone through three motion detector battery operated lights. At anchor they have all turned the light on repeatedly when the boat rocks. Also if a dinghy is tied to the stern the motion detector is triggered from time to time.

This would be different of course if the motion detector was aimed so that it only covered the deck and not the sea.
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Old 04-26-2017, 08:49 AM   #8
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Just wondering if anyone has a used a sensor that they are happy with. The ones I've found so far have the virtue of being cheap ($10) but the reviews are spotty. But at that price, I can just try one.
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Old 04-26-2017, 08:53 AM   #9
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Yes, hopefully I can adjust the sensitivity to avoid false alarms. Good advice about the dingy. I usually raise it on the rear davitts to block the swim platform and keep the bottom clean. I know I sound a little paranoid, and we haven't encountered any pirates in Rhode Island, but the admiral would sleep better.
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Old 04-26-2017, 12:06 PM   #10
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How about a solar powered motion activated spotlight? Completely self contained.

Solar - Outdoor Security Lighting - Outdoor Lighting - *The Home Depot

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Old 04-26-2017, 01:13 PM   #11
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Yes, I looked at those and that may be my solution. I may even wire it to a relay to operate some other lights. I'm going to try a sensor first and see how that goes.
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Old 04-26-2017, 01:54 PM   #12
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We use Ring doorbell and camera's at home and love them. We just added the security light/camera/siren/2-way speaker mounted to dock piling with solar charger facing the aft of our boat. Requires internet which we have at boat. It is not a cheap solution but I can log into app and see boat at any time. You are alerted on you phone with any activity and have 2-way talking. Worked great talking to boat washers to ask them to scrub out hatch cover drain grime from 2k miles away. You can set a wide range of field and sensitivity settings in app to tune for your boat environment. Probably overkill but cool as hell.

https://ring.com/security-cams
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Old 04-26-2017, 02:00 PM   #13
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If you mount the sensor below the gunnel in the cockpit it should only "see" motion in the cockpit...or are you trying to activate the light before the boat is boarded ?

They have motion activated game cameras that take a picture with a flash when a deer walk down a trail.....having that aimed at the cockpit might be a deterrent as well as help ID the bad guy ( or girl ).
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Old 04-26-2017, 02:19 PM   #14
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Quote:
Originally Posted by Bay Pelican View Post
I have gone through three motion detector battery operated lights. At anchor they have all turned the light on repeatedly when the boat rocks. Also if a dinghy is tied to the stern the motion detector is triggered from time to time.

This would be different of course if the motion detector was aimed so that it only covered the deck and not the sea.
Same experience here. I mounted 3; one on each side deck and one in the cockpit. Too many false alarms from waves and birds. I adjusted the motion sensors to just cover the deck and found they were pretty useless. We removed them.
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Old 04-26-2017, 02:25 PM   #15
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Ok, from lowest price to top.

Go to Lowes or Home Depot. They have a lot of motion activated lights. People have them on their homes. Location will be your key. This doesn't use your spreader lights but uses the lights in the units.

I think you might find Aqualarm to meet your needs plus some others. It's a nice system. Defender sells it.

Now, a great system in my opinion is Yachtprotector, from the same people as Yachtcontroller.

Or if you want to go all the way, go Gost or Frankentek. I don't think what you're interested in. Just had to list.
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Old 04-26-2017, 02:43 PM   #16
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Thanks everyone! Seems those who have tried them were not happy...not good news, but still I'll play around with it.
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Old 04-26-2017, 03:01 PM   #17
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I use a trip wire system with a blank 12 gauge round. It scares the hell out of prowlers and animals, but doesn't hurt anyone.

Firequest They also have lethal and non-lethal rounds.
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Old 04-26-2017, 03:12 PM   #18
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Greetings,
Mr. L. While I sympathize with your system AND your sentiments, it IS possible a boarder up to no good may suffer hearing damage and sue you. I would caution against taking the chance due to the current litigious society.
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Old 04-26-2017, 03:18 PM   #19
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plus there's the "revenge" factor......once the intruder calms down he may be so pissed that he does more damage.
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Old 04-26-2017, 03:26 PM   #20
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we have four of these mounted at each entrance. We have been very happy with them.
I mounted them with magnets to if they contact a piling or lock wall they swing free.

https://www.amazon.com/Activated-Sec...r+motion+light
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