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Good morning! This is a small thing, I know, but something I have thought about for some time. What might I be missing? Here it is- some watches are labeled that they are rated to 200 meters/660 feet, and 20 atm. Wouldn't 200 meters/660 feet be 21 atm? And, the inverse- wouldn't 20 atm be...

Hi! I was wondering what software folks use for editing underwater images. What got me thinking about it was an e-mail offer I received for a program called "DIVE #1 Professional" from a company named Franzis. I am just wondering if it is a good resource, or if there are better ones. Thanks...

Good afternoon, fellow divers. I recently purchased a Perdix, which arrived yesterday. In the Perdix manual, it says "Accepted battery types The Shearwater Perdix can accept a wide variety of AA sized batteries. The Perdix can accept any AA sized (or 14500 size) battery that outputs a voltage...

I'm not sure how this will affect divers, but thought it might be interesting for this group. https://www.chemengonline.com/new-helium-purification-plant-begins-operation-in-saskatchewan/?oly_enc_id=1138I1707801F4V

Good morning! Way back in OW, we were taught that seawater is more dense, hence would require more weight to offset buoyancy. The standard values used are 62.4 lb/cf for freshwater, and 64 lb/cf for seawater (which can actually vary, based on salinity.) I have been thinking about that, and...

Good morning! I was wondering whether anybody knows of a comparison of what the Divemaster (Guide, or other name) certification means by agency. Can they teach snorkeling, lead dives, etc.? Perhaps somebody has looked at this? Thanks, and have a great day! Bob

Hi! I have done the SSI Marine Ecology and Science of Diving specialties online (one this year, one last year) and was wondering what other specialty classes SSI has that are academic, not requiring dives. I am looking at something to do this winter to keep my mind active, even if I can't go...

Hi! I thought I had read (not sure where, at the moment) that 3500 psi was the cut off, at and above which cylinders become "high pressure", and require a DIN type valve. I believe I have seen tanks marketed at 34XX psi with yoke valves, perhaps as 'medium pressure'? And, there are low...

Hi! I did a search, but didn't see anything on this topic. Of course, I might not have used the right search terms. If there's already a thread, please let me know. My question is- what sort of experiences have people had with the "pro" tank valves? I currently only have yoke style first...

Hi! I was wondering whether anybody has any experience with the McLean Extreme 5 dive computer McLean Extreme 5 dive computer . There doesn't seem to be much information out there. Thanks! Bob

Good morning! I know that when asking for input on any gear, most answers start out with "It depends..." I will say up front that I would in no way be pushing the limits or using this computer to it's maximum. While I might some day take the Advanced Nitrox/Decompression Procedures training...

I think my title may be a little vague, and which subsection of the forum this fits in is something I am unsure of. But what I am wondering is which equipment- particularly regulators and dive computers, but any other gear, as well- is the same as others, just rebranded, and maybe re-priced. I...

Hi! As mentioned by others in various threads, the cost of a new cable for dive computers ($90 in this case) is pretty high. Does anybody have a cable they would part with for considerably less? Thanks! Bob

Hi! I have seen mentions in different threads how transmitters from different manufacturers are compatible with those from other manufacturers. Is there a list of which are compatible with which others? Thanks! Bob

Historian Diver Class - VIRTUAL CLASS Has anybody taken this course, or anything similar? Are there any websites that already have this information compiled? Thanks!

Hi! I have been reading (and watching videos) that talk about the benefits of newer types of fin "straps." I have a variety of fins, from my original set of Dacor Turbo Jets, to Aqualung Blades, to Cressi Superfrog and Scubapro split fins. My question is whether the posts on these fins are...

Hi- if there is already a thread that covers this, please point me in the right direction. I am curious as to how complicated it is to work on my own regulators. What tools are needed, that sort of thing. As examples of regulators I have: Sherwood Blizzard Aqualung LX and ABS Apeks TX100/TX50...

2020 version of the Boston Sea Rovers Convention. More to be posted on the website. About the Boston Sea Rovers Show - Boston Sea Rovers

Hi- there was an older thread regarding budget/DIY/assemble yourself computer interfaces for the above referenced dive computers, but I am not finding much recent material. Are there any sources of these currently? I do have the serial interface for my Spyder, and I got a serial/USB adapter...

Does anybody have the Suunto DM 1.6 that they could share? My initial contact with Suunto was that 3.1 would work with my Spyder, but it isn't listed as a supported device, and none of the other options (including "other") work. I would like to try v. 1.6, if I can find a copy. I have also...