4 diveres went missing - Malpelo, Colombia
- Thread starter Rod-Scuba
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Dan
Contributor
That's a good idea. If you want to do that, you may want to first put the PLB1 inside its float pouch, then vacuum sealed it with the seal-a-meal, before putting them in a waterproof case. My old underwater camera case would be too small for that. You would need the waterproof case that looks like a cylinder, like Ken T uses, as shown above. So when you pull it out of the case & you accidentally drop it in the sea, it will stay afloat, it won't sink into the bottom of the sea.
In my case to fit it inside a box-form underwater camera case, I have to attach the float pouch to the PLB1 with a string & place the pouch next to the PLB1 in the camera case. I guess you can try to seal-a-meal the float pouch & the PLB1 next to each other to make them like a box shape vacuum sealed unit rather than to look like a ball or a cylinder shape vacuum sealed unit.
On the other hand, the PLB1 is waterproof up to 50' (25 psig). If the camera case leaks at 100' depth, as long as the leak is slow enough for an hour dive to not filling up the case completely to pressure up the inside case up to 25 psig, I won't worry too much about vacuum seal it.
The nice thing about the plastic underwater camera case, you can actually see if it leaks. If it leaks a little bit, as long as there are plenty of air inside, the air is compressible, so the pressure inside the case will be lower than the outside water pressure. If you dive at 100' deep & see a little bit water leak inside the case, I won't worry too much about flooding the PLB1. When you are done with the dive, just drain the water out & fix the leak with new oring or may be it's just a dog hair stuck on the o-ring seal that you can remove it & reapply the oring surface with silicon grease.
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I've been waiting 15+ years for my Dive Alert to quit working. Maybe they don't make 'em like they used to? 
K
KeithG
Guest
You also need to be careful to ensure that they "start working". On a recent LOB trip a fellow diver showed up with one and discovered that it did not work with his BCD. It worked with mine. The inflator nipple on his BCD (brand I do not remember)w as just slightly longer than mine (Cressi) and the Divealert would not couple to his BCD.I've been waiting 15+ years for my Dive Alert to quit working. Maybe they don't make 'em like they used to?
He was unhappy. And ill-prepared?
I have been floating with someone who used the dive alert and the boat never heard it. I personally think if they have engines running, they can't hear much. They did finally see our SMBs though.
K
KeithG
Guest
I vaguely remember wookie remarking that a boat can not hear a whistle (or dive alert).
This would be a subject to get more feedback on. We carry whistles. Are they (mostly) useless?
clownfishsydney
Contributor
I do not carry a whistle precisely because it is useless. A boat searching for a diver will never hear a whistle or a dive alert unless they are so close they would be obviously seen or they have their engine/s off. Very, very unlikely that any searching boat would even think to turn off their engine every few minutes.
I had two previously and they never lasted more than 2-3 yrs.I've been waiting 15+ years for my Dive Alert to quit working. Maybe they don't make 'em like they used to?
Apparently it doesn't matter, inasmuch as, the others are saying they're useless anyway. I'm unlikely to replace mine if it ever quits working.
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