Jon, I happen to have on hand 4 bright orange buoys that are ideal for this and pretty much indestructible. They've got a hole through the middle for attaching a line, and are 8.5" in diameter. We just need another 2 subs to go with the buoys. Snoopy will have both Bartsch comms and single side band, but I am still lacking a second SSB unit for topside -- just the other day I lost an eBay bid for one. Due to the built-up nature of the surroundings and the boat traffic in the inlet, it could be there's too much ambient noise to communicate over audible frequencies (just speculation). I think Dan Lance was planning to bring a pair of OTS units. If so, we could use one topside and one in Jim's boat for SSB all around, and those should be immune to ambient noise. I think both Jim and I will have VHF, but if the SSB transducers are below the waterline they work just fine when surfaced. My main concern is submerged collisions, and in particular collisions with Snoopy's acrylic dome. So although generally speaking I don't like the idea of buoys due to entanglement potential, in the scenario of two subs sharing a cove in shallow water they make sense. Surface support would have the job of alerting us if our buoys are on a collision course. Yes, we should have a pre-dive meeting to go over procedures. Thanks, Alec The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jon Wallace Sent: Wednesday, May 26, 2010 10:12 PM To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] PSUBS 2010 Convention Update A good time to bring up some other dive issues. First, we have a team of local divers who have offered to act in a safety capacity. I have told them that one diver per submersible should suffice. Do we need more? Because we will be in navigable waters, my interpretation of Coast Guard requirements is that any surface vessel providing support needs to fly the "A" alpha flag because of reduced mobility. It's not clear to me if the "cove" we will be in is far enough out of the way of other traffic that we don't need these flags. A diver-down flag is required for scuba divers. Each sub should tow a buoy on the surface so we know where you are. Should we standardize on a buoy type? Each sub needs a VHF radio so we can communicate on the surface. I have two hand-held VHF radios that I will be bringing with me. We'll need to agree upon a channel for comms. Underwater comms can hopefully be achieved with David Bartsch's devices. Because they use audible frequencies, divers should also be able to hear instructions. We should plan on a "dive" meeting to work out any details between subbers and scuba-divers. comments? Fritz, Benjamin T AT1 CNATTU, JACKSONVILLE wrote: > This will be my first Psubs convention and all I have so far are my schematics. Those aren't even finished yet and have gone through a couple re-designs. I cant wait to get some input from you guys. > > As far as the diving at the site with SCUBA, who all is planning on bringing their gear to be safety divers or for fun? > > ************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. 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