> The deep water gear consists of three "Wall" type > Transmission is by the condenser discharge method. > in a flange welded near the bottom of the hull. > receiver unit, mounted horizontally, 28in. > frequency 1,500 cycles per second and a similar > type, using a magneto-striction transmitter of
> “The shallow water gear is of the super-sonic
#BOAT DEPTH GAUGE ARCHIVE#
> From “U-boat Archive Series Volume 7â€: > Apparently there was a deep water version too. > operating as U-190 did, in shallow waters.†> finding equipment was important for U-boats > picked up by receivers, both senders and receivers > pulses sent out by transmitters which were then > “This equipment measured the response to sound > located over the navigator’s table in the > the Atlas Echolot depth sounding device, generally > two or three ways that was accomplished & of > As to measuring the depth of the water I know of > the boat (forward torpedo room and the diesel room > were backups for at least one of them elsewhere in > gauges were mounted in the control room but there
> after it was commissioned and I think her Chief > atmospheres that was added to the boat sometime > fourth depth gauge that measured water pressure in > I know of at least one U-boat that also had a > liquid filled tube mounted on a plate with the > the first 25 meters of the larger gauge. > limited range allowed it to me more accurate than > a round gauge that only went to 25 meters. > It is the gauge we would normally consider as > large round gauge that you mention from Das Boot. > Actually there were three depth gauges on a U-boat Hopefully someone will step up and explain them for us. I think these cartridges were ejected from the bold ejector and I may well have misunderstood their intended use. Perhaps they were used in conjunction with the Echolot or in addition to it or perhaps they came before the Echolot gear. I think they may have ejected the cartridges and measured the time until they detonated or something like that. I don’t know how they were used though. Provision is also made for hand transmissions and aural reception, using a stop watch for determining the depth.â€Īdditionally I have read about some cartridges containing an explosive material that I think were also used for this purpose in deep water. The same depth indicator, namely a rotating neon tube, is used for both deep and shallow sets, the ranges being 0-125 meters shallow and 0-1,000 or 0-3,000 meters deep. apart.Īn alternator giving 1,500 cycles per second, provides the power for the transmitters at the working frequency of 3,000 cycles per second. The deep water gear consists of three "Wall" type sonic transmitters connected in parallel and three moving coil receivers connected in series, mounted in the keel, 32 ft. Transmission is by the condenser discharge method. apart, in a flange welded near the bottom of the hull. €œThe shallow water gear is of the super-sonic type, using a magneto-striction transmitter of frequency 1,500 cycles per second and a similar receiver unit, mounted horizontally, 28in. From “U-boat Archive Series Volume 7â€: This depth finding equipment was important for U-boats operating as U-190 did, in shallow waters.â€Īpparently there was a deep water version too. €œThis equipment measured the response to sound pulses sent out by transmitters which were then picked up by receivers, both senders and receivers being mounted in the lower hull. The first was the Atlas Echolot depth sounding device, generally located over the navigator’s table in the control room. All of these gauges were mounted in the control room but there were backups for at least one of them elsewhere in the boat (forward torpedo room and the diesel room I think).Īs to measuring the depth of the water I know of two or three ways that was accomplished & of course there may have been others.
It may or may not have existed on other U-boats. I know of at least one U-boat that also had a fourth depth gauge that measured water pressure in atmospheres that was added to the boat sometime after it was commissioned and I think her Chief Engineer added it but am not sure. This is the gauge used for periscope depth. It was simply a liquid filled tube mounted on a plate with the outline of the periscope on it. Its limited range allowed it to me more accurate than the first 25 meters of the larger gauge. The second gauge was also a round gauge that only went to 25 meters. It is the gauge we would normally consider as being the depth gauge. The first was the large round gauge that you mention from Das Boot. Actually there were three depth gauges on a U-boat that I know about for sure.
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