After reading this thread for awhile i thought i'd chuck in a few points to ponder that & that people should add to their reasoning.
1. The high speed cats for transport as sugested by Kirkhill. Their hulls are made of aluminum and hence pretty usless in ice. Their propulsion system is water-jet which involves sucking in great quantities of water & spewing it out the back once again useless in ice.
Their much touted high speed also is a great advantage in calm water but falls off rapidly in rough water and the ride is somewhat like being in a airliner in severe turbulance and have to remain in your seat strapped in with a seat belt .
2. The JSS is first of all a tanker ,and as such, under new international regulations soon to come in force, are required to have a double hull for safety (one reason besides age we are replacing the AOR"S) . Some of the ships suggested in this thread to be aquired for our Navys RAS requirement do not have double hulls hence do not meet our needs. Also ,as a tanker it has very strict rules where any open flame is allowed because fuel fumes go Boom hence putting air defence missils all over them with flames shooting out of them when they launch may not be a good idea. The British Navy is having to get rid of several tankers not because of their age but because they don't have double hulls. The double hull requirement may also be a factor in not having a floodable well deck in JSS and to opt for a stern ramp & mexifloat system.
3. The LPD17 saga is still ongoing earlier reports of cost overruns were just the tip of the iceburg and the cost for the first of class is now well over a billion although subsequent ships of the class may well be cheaper. She has just recently been reluctantly accepted from the builder with a long list of defects & shoddy work that will cost still more to rectify. Still this is to be expected with a first of class.
4. The Brits are in the process of aquiring new Carriers and they are too large to be built in any one shipyard in Britain so they are going to build them in 4 or 5 different yards in mega building blocks then join them together at another location. So the discussion weather Canadian yards are large enough are moot . Case in point the Hibernia oil platform which is a huge structure was put together in a bay in NFLD.
1. The high speed cats for transport as sugested by Kirkhill. Their hulls are made of aluminum and hence pretty usless in ice. Their propulsion system is water-jet which involves sucking in great quantities of water & spewing it out the back once again useless in ice.
Their much touted high speed also is a great advantage in calm water but falls off rapidly in rough water and the ride is somewhat like being in a airliner in severe turbulance and have to remain in your seat strapped in with a seat belt .
2. The JSS is first of all a tanker ,and as such, under new international regulations soon to come in force, are required to have a double hull for safety (one reason besides age we are replacing the AOR"S) . Some of the ships suggested in this thread to be aquired for our Navys RAS requirement do not have double hulls hence do not meet our needs. Also ,as a tanker it has very strict rules where any open flame is allowed because fuel fumes go Boom hence putting air defence missils all over them with flames shooting out of them when they launch may not be a good idea. The British Navy is having to get rid of several tankers not because of their age but because they don't have double hulls. The double hull requirement may also be a factor in not having a floodable well deck in JSS and to opt for a stern ramp & mexifloat system.
3. The LPD17 saga is still ongoing earlier reports of cost overruns were just the tip of the iceburg and the cost for the first of class is now well over a billion although subsequent ships of the class may well be cheaper. She has just recently been reluctantly accepted from the builder with a long list of defects & shoddy work that will cost still more to rectify. Still this is to be expected with a first of class.
4. The Brits are in the process of aquiring new Carriers and they are too large to be built in any one shipyard in Britain so they are going to build them in 4 or 5 different yards in mega building blocks then join them together at another location. So the discussion weather Canadian yards are large enough are moot . Case in point the Hibernia oil platform which is a huge structure was put together in a bay in NFLD.