by NWTech065 » Sat Dec 20, 2008 3:30 pm
michel lamarche wrote:Thanks . But I have a little problem. I wanted to build an Annapolis class destroyer because at the end of their life ,they were experimenting the new sonar(cantass ship) so I wouldn't have to scratchbuild the variable depth sonar .but I can't find very useful info on what is between the mast and the bridge.
The Improved Saint Laurent (ISL) destroyers had the variable depth sonar (VDS) handling system fitted to an open stern, and of those, HMCS FRASER (DDH 233) was the first Canadian ship to use towed array. She had her VDS handling system modified in the mid 1980s order to conduct operational and towing trials with the ETASS (Experimental Towed Array Sonar System).
After FRASER completed the towed array trials, HMCS ANNAPOLIS (DDH 265), sister ship to HMCS NIPIGON, was the first ship to be fitted with an operational towed array, which was essentially the Canadian version of the ETASS called CANTASS (Canadian Towed Array Sonar System). As part of the CANTASS fit, the open stern of ANNAPOLIS was closed in, and the entire towed array handling system was contained within the ship. That array was launched out of an overboard towing fairlead that was built into the stern, a practice which was continued with the Canadian Patrol Frigates (CPFs).
Both HMCS ANNAPOLIS and HMCS NIPIGON are ANNAPOLIS Class destroyers, and they were only the two ships in that class. They were also the last of the "steamers" to be built. NIPIGON was also fitted with CANTASS in the same manner as ANNAPOLIS (stern closed in).
As for what was located between the mast and bridge, on the ISLs there was an open bridge that was slightly behind and aft of the bridge, and adjacent to that was the "penalty boxes" where the lookouts were stationed. That area was slightly different and smaller on the two ANNAPOLIS Class ships and nothing was fitted there.
[quote="michel lamarche"]Thanks . But I have a little problem. I wanted to build an Annapolis class destroyer because at the end of their life ,they were experimenting the new sonar(cantass ship) so I wouldn't have to scratchbuild the variable depth sonar .but I can't find very useful info on what is between the mast and the bridge.[/quote]
The Improved Saint Laurent (ISL) destroyers had the variable depth sonar (VDS) handling system fitted to an open stern, and of those, HMCS FRASER (DDH 233) was the first Canadian ship to use towed array. She had her VDS handling system modified in the mid 1980s order to conduct operational and towing trials with the ETASS (Experimental Towed Array Sonar System).
After FRASER completed the towed array trials, HMCS ANNAPOLIS (DDH 265), sister ship to HMCS NIPIGON, was the first ship to be fitted with an operational towed array, which was essentially the Canadian version of the ETASS called CANTASS (Canadian Towed Array Sonar System). As part of the CANTASS fit, the open stern of ANNAPOLIS was closed in, and the entire towed array handling system was contained within the ship. That array was launched out of an overboard towing fairlead that was built into the stern, a practice which was continued with the Canadian Patrol Frigates (CPFs).
Both HMCS ANNAPOLIS and HMCS NIPIGON are ANNAPOLIS Class destroyers, and they were only the two ships in that class. They were also the last of the "steamers" to be built. NIPIGON was also fitted with CANTASS in the same manner as ANNAPOLIS (stern closed in).
As for what was located between the mast and bridge, on the ISLs there was an open bridge that was slightly behind and aft of the bridge, and adjacent to that was the "penalty boxes" where the lookouts were stationed. That area was slightly different and smaller on the two ANNAPOLIS Class ships and nothing was fitted there.