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Old 08 August 2014, 07:32   #1
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J1S4 Waterproof VHF

Hi,

We took our 2.6m Wetline out for the first time yesterday. Launching from the beach was a bit awkward, as my wife has no idea how to use oars, and pushing the boat into deeper water only had the tide push us back in I waded out to chest height and then manages to "rescue" into the boat (which was good, as it gave practice for climbing into the boat). However, the VHF radio was submerged all this time, and of course was switched on to channel 16. Checked it, and it was dead, with water in the LCD display. After a couple of laps of the bay, I returned to shore and we came home, happy but wet. I thought I had destroyed the radio by not replacing the rubber in the charging jack (which would let water in, I am sure). But researching what J1S4 means, it appears the waterproof is relating to splash, vertical rain and such, so weatherproof perhaps, but not 10 feet below the surface (although I was not that deep!) The radio is a Cobra Marine HH125. Opening it up the morning to check the damage, it smells as though circuits or components have blown and burnt out, and the state of the board is like it had been corroding for months! It is a new radio, not second hand with a bit of dampness. So I guess I have learnt a quite expensive lesson, but feel it better to happen in chest high water rather than in a situation where assistance was needed and the radio was useless. Also my torch, which was in a drybag, got destroyed, as the drybag was a cheaper type for a camping shop....it let around a cupful of water in..... Oh well, lessons learned. Regarding launching from surf (which was gentle) I suppose I should have my wife sit on the tube by the motor, push the boat out a bit, get in and then get on the seat and row into deeper water before starting the engine? Our problem was not realising how quickly the tide brings you back in ( I suppose surfers move pretty fast!)
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Old 08 August 2014, 10:08   #2
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I wouldn't recommend a cobra radio as they don't have very good build quality. I'd recommend a standard horizons or Icom
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Old 08 August 2014, 14:48   #3
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Taken from Waterproof standards for VHF Radios - WTF is JIS / IPX?


The JIS Scale
The Japan Industrial Standards (JIS) for water resistance uses a "0" to "8" scale to define the level of water ingress protection built into VHF Radio. If the radio has been tested in compliance with this standard it is usually listed on the product spec sheet.
◦JIS "0" No special protection
◦JIS "1" Vertically dripping water shall have no harmful effect (Drip resistant 1)
◦JIS "2" Dripping water at an angle up to 15 degrees from vertical shall have no harmful effect (Drip resistant 2)
◦JIS "3" Falling rain at an angle up to 60 degrees from vertical shall have no harmful effect (Rain resistant)
◦JIS "4" Splashing water from any direction shall have no harmful effect (Splash resistant)
◦JIS "5" Direct jetting water from any direction shall have no harmful effect (Jet resistant)
◦JIS "6" Direct jetting water from any direction shall not enter the enclosure (Water tight)
◦JIS "7" Water shall not enter the enclosure when it is immersed in water under defined conditions (Immersion resistant)
◦JIS "8" The equipment is usable for continuous submersion in water under specified pressure (Submersible)



The IPX Rating

The IPX rating usually comes as IPX-7 or IPX-8.
•IPX-7 - water-proof, immersion resistant for 30 minutes under 1 meter (3 feet) of water.
•IPX-8 - water-tight under immersion for 30 minutes under 2.6 meters (8 feet) of water.


Not really surprising it didn't survive. Live and learn, I guess.

jky
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Old 10 August 2014, 14:05   #4
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Yeah the cheap cobra is only splash proof. If you were buying another you'd want it in a Waterford radio bag. Also doesn't float.

Be aware that event IPX7 ones are only tested for 30 mind so not in bottom of boat all day and no garuntee that it works straight out the water the test would allow it to be dried out first. Not internally though.

aldi do dry bags from time to time which have a good reputation. In my experience the heavier bags still puncture if you put screw drivers in them. Some on here would recommend a Pelicase . or put stuff in clip lock boxes and put those in dry bag.

Would suggest looking for waterproof torch or at least taping up with insulating tape to keep water out when used...
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Old 10 August 2014, 15:33   #5
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I use a cheap 30 VHF handheld programmed to marine bands in an 20 Aquapac case (with a silica gel sachet).
As above you have two options:
1) Icom or Standard Horizon for a proper waterproof set
2) Cheaper set in a decent case (not the rubbish one that comes with a Cobra or Midland)
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Old 11 August 2014, 08:58   #6
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re surf launch you only need enough depth to get the prop clear so water to the Gentleman bits is normally enough if you stand to the side of the boat (fine to have engine on idle while raised then lower engine and jump in and go..... going chest high will get you wet, the boat wet and does no favors. in big swell then timing is key!

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Old 11 August 2014, 11:42   #7
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Quote:
Originally Posted by HDAV View Post
fine to have engine on idle while raised then lower engine and jump in and go.....
Hope I misread this!
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Old 11 August 2014, 11:51   #8
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Hope I misread this!
Me too
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Old 11 August 2014, 11:55   #9
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I wouldn't recommend a cobra radio as they don't have very good build quality. I'd recommend a standard horizons or Icom
+1 Personally I wouldn't use anything but Icom, I'm not saying that SH aren't any good, it's just that I've no experience of them. I have always used Icom & they've never let me down, either on the sea or at work. I have an M71, now superseded my the M73, cracking bit of kit & IPX8.
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Old 11 August 2014, 16:53   #10
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Icon M23 float and flash have been great for us.
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