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Post by nikeajax on Oct 29, 2016 10:05:21 GMT -8
I hear ya', and think I was thinkin' about the Dart II, not the Dart. The Dart II had a Venturi, whereas the Dart just threw the air out into the chamber through four different holes. At one point some years ago I got so frustrated with my Dart that I cut the LP hose apart so I would not be tempted to dive it again. I kinda' regret doing that, as the LP hose on the original Dart was unique, with a non-standarepd fitting. The Dart II, while a better breathing regulator, is (at least for mine) a "honker" that emits a Goose-like honk on each inhalation. That also is very frustrating, and means for me, "pool only." John GRRRRR--I am talkin' 'bout the D-II--grumble, grumble, grumble That thing squeals like a "stuck pig"! Actually, it's more of an ear-piercing-ring with a slight waver to it. I wanted so much to like these too; man, ya know the HW's just kinda mush these things into the ground with their performances compared... I do think it is a rather attractive reg though Anyway, back to gauges... JB EDIT: I've told this story before, but I have a niece and nephew who are big Star Wars fans, and since the Dart was used to do the sound of Darth Vader's breathing, I tried to show them, "OK, close your eyes... now what does this sound like... SQUIIIIIIIIIIIIIIINK!"
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Post by tomcatpc on Oct 29, 2016 10:17:10 GMT -8
Those dimensions seem to be the right tubing to use on the capillary gauges. There should be some topics on here that deal with replacing the tubing. Mark
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Post by tomcatpc on Oct 29, 2016 11:33:39 GMT -8
US Divers Pressure Gauge. Mark
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Post by SeaRat on Oct 29, 2016 17:17:23 GMT -8
Here is one of my newer acquisitions, a Scubapro console from the 1970s. Here's the whole set. This is an interesting depth gauge. I haven't yet tested it, but the scratches should "go away" (become invisible) underwater. Here you can see the compass up close. Compasses only work if the diver knows how to use them, and I don't think much of that is now taught in a dive class. You have to determine your direction, in degrees, and set the line of travel on that degree. This shows the line pointed toward magnetic north; if you are using a map, they are drawn on true north, so a declination needs to be used if you use a map. But mostly underwater you are using magnetic north and magnetic settings from the surface to determine undewater travel. A reasonable pressure gauge; note the area under 500 psig is color coded. John
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Post by SeaRat on Oct 29, 2016 17:34:28 GMT -8
Okay, I bet you thought I did not have these correction tables. These came from a high altitude diving conference I attended as a member of our Pararescue Team (USAF sponsored) in about 1975. I still have all my notes from this conference, which I passed along to the USAF. Here's the set of tables: The Cross Tables were put together by E.R. Cross for use with regular sea level U.S. Navy dive tables. I want these tables here, as they will help you to understand how to use your gauges when diving at altitude. But I will also be posting these, along with some problems, in the "Vintage Instruction and Technique" section, as I want in visible with its own thread. John
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Post by tomcatpc on Oct 29, 2016 19:23:53 GMT -8
I was always under the impression that the large consoles were more of an 80's to recent thing? Then again, I've been diving for three years (including time spent after heart fiasco), so a lot of this is new.
I have noticed that some of my gauges and watch is easy to read submerged and look scratched up on topside. Mark
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Post by DavidRitchieWilson on Nov 1, 2016 0:04:41 GMT -8
I don't own any gauges, but there is an interesting device with gauges in a Soviet diving book I now own, entitled "Техника подводного спорта" (Underwater sports technology) written by P. P. Serebrenitskiy and published in 1969. Here is a rough English translation of the accompanying Russian text: 5. ORIENTATION DEVICES, DETERMINING DISTANCE AND SPEED Special devices alone can do exact calculations when determining the direction, velocity and distance of travel under water. A set of these devices usually consists of a compass, a logging device (instrument registering distance of travel), a depth gauge, a clock or a stopwatch. There may be other instruments to use. For ease of use, all the instruments are mounted on a special stabilising device. Such articles with devices mounted on them are often called "aquaplanes". Aquaplane design, shape and dimensions do vary; aquaplanes are not yet in commercial production. The simplest underwater orientation device is a special frame (1) with a compass (3), depth gauge (4) and a clock (2) mounted on it (Fig. 60). The compass comes with a convenient device to monitor the vertical scale. Lightweight smaller-sized KI-11 and KI-13 type magnetic compasses have this scale, which explains their widespread use. The presence of a sighting device enables the direction of the target to be determined accurately. A swimmer holds the device effortlessly in his hands (Fig. 60, b). The presence of two brackets (5) around the forearm ensures that the position, convenience and reliability of the sight remain stable. The big disadvantage is the lack of a logging device, which makes it impossible to determine directly the distance of travel.
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Post by SeaRat on Nov 1, 2016 7:18:01 GMT -8
David, Underwater Orienteering is a competitive sport in the EU, one which happens also in Great Britain, under CMAS. There are many devices such as this available today for this sport. This star course is insanely difficult. www.cmas.org/orienteeringJohn
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Post by vance on Nov 1, 2016 7:29:07 GMT -8
Those dimensions seem to be the right tubing to use on the capillary gauges. There should be some topics on here that deal with replacing the tubing. Mark I got the tubing yesterday. It is larger in diameter than the original piece I took out. I believe it should be 1/8 inch rather than the 3/32 inch I got. It will fit in the groove, however. I don't know what effect it will have on accuracy. I heated the ends with my heatgun, and put the gizmo in. It seemed fine, but the slot that lets the water in was turned incorrectly so I took it back off and reinserted it. And broke it. A piece cracked off along the slot. Great.
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Post by DavidRitchieWilson on Nov 1, 2016 10:43:26 GMT -8
David, Underwater Orienteering is a competitive sport in the EU, one which happens also in Great Britain, under CMAS. There are many devices such as this available today for this sport. John Thanks, John, for the explanation and the illustrative videos. I'd heard of underwater hockey and even bog snorkelling (both UK inventions), but I hadn't come across the underwater version of orienteering before. David
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Post by nikeajax on Nov 1, 2016 12:45:37 GMT -8
I don't own any gauges, but there is an interesting device with gauges in a Soviet diving book I now own, entitled "Техника подводного спорта" (Underwater sports technology) written by P. P. Serebrenitskiy and published in 1969. Here is a rough English translation of the accompanying Russian text: 5. ORIENTATION DEVICES, DETERMINING DISTANCE AND SPEED Special devices alone can do exact calculations when determining the direction, velocity and distance of travel under water. A set of these devices usually consists of a compass, a logging device (instrument registering distance of travel), a depth gauge, a clock or a stopwatch. There may be other instruments to use. For ease of use, all the instruments are mounted on a special stabilising device. Such articles with devices mounted on them are often called "aquaplanes". Aquaplane design, shape and dimensions do vary; aquaplanes are not yet in commercial production. The simplest underwater orientation device is a special frame (1) with a compass (3), depth gauge (4) and a clock (2) mounted on it (Fig. 60). The compass comes with a convenient device to monitor the vertical scale. Lightweight smaller-sized KI-11 and KI-13 type magnetic compasses have this scale, which explains their widespread use. The presence of a sighting device enables the direction of the target to be determined accurately. A swimmer holds the device effortlessly in his hands (Fig. 60, b). The presence of two brackets (5) around the forearm ensures that the position, convenience and reliability of the sight remain stable. The big disadvantage is the lack of a logging device, which makes it impossible to determine directly the distance of travel. DRW, this really doesn't look like 1969 to me, it looks more like, well, 1909! I detest the phrase "Steam Punk" but this looks like something thrown together just for grins. As I was telling my wife, it looks like something my brain came up with while I was dreaming... Thanks for sharing this with us JB
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Post by tomcatpc on Nov 1, 2016 13:45:28 GMT -8
Almost looks like something Leonardo Di Vinchie would have drawn up... Mark
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Post by diverdon on Nov 1, 2016 15:42:58 GMT -8
I wan one
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Post by SeaRat on Nov 1, 2016 17:40:23 GMT -8
I think the Russian orienteering device would work pretty well, but that it is not very streamlined. I think it probably came from the military, for getting from one place to another in a straight line. If you will look at the Underwater Orienteering image below from the video, you can see a very streamlined unit that is below the diver, so that the diver doesn't even have to look up to swim a compass course. The scuba is held in front of him for streamlining too. John
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Post by tomcatpc on Nov 1, 2016 19:33:56 GMT -8
The drawn image just screams "military manual" image to me, does not matter what nation, it seems somethings are very similar in military forces the World over. Mark
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