Mister E
Well-Known Member
What a desperate thing to suggest putting the lives of others on a rich mans toy just to save money.
Perhaps if your arse were a bit smarter you might spout something other than crap....
The 350 lifeboats includes RIBs.
The "hard" boats total 159.
Shannon 10 + 4 (reserves) = 14
Tamar 23 + 4 = 27
Severn 35 + 9 = 44
Trent 29 + 8 = 37
Mersey 26 + 5 = 31
Tyne 4 + 2 = 6
https://rnli.org/what-we-do/lifeboats-and-stations/our-lifeboat-fleet
"That’s why we want the entire RNLI all-weather lifeboat fleet to be capable of 25 knots by 2019."
That suggests that the Mersey and Tyne classes whose top speed is 17-18 knots will be replaced by Shannons in the next two years. (ie 18 boats per year) The other models have a top speed of 25knts.
As they have also said that they will be focusing on the Shannon and Tamar models in the future, that leaves a potential of 81 boats (Severns and Trents) to renew (give or take). At a rate of 18 boats per year (give or take) that's capacity assured for the next 5 years.
Then what?
What problems?
You ignored my earlier post on this subject.
I think there's a chance that '2.5 metres' and 'no preset limits are in fact both correct answers but to very different questions.
I'm sure the 2.5m answer is to the question "what is the maximum depth of water a L&RV can be operated?" Well that's simply a function of the height of its air intake. IIRC the Talus tractor could wade to 8 feet in calm water so 2.5m for the new one seems right. As the Shannon can be launched in 1 metre of water on a gently shelving beach, the 1.5 metre margin allows for any white water along the beach edge. If the tractor unit is caught out and abandoned, then battened down it can survive up to 30 feet of immersion which was the same as the Talus as this is the maximum tide depth on the beaches where the L&RV furthest from the HW mark. (I think the max is 3 miles at Hoylake).
The 2.5m is also the maximum wading depth for crossing channels in the sand when taking the boat along the shore to a viable launch site. The Talus at 8 feet could handle the main channel at Wells when heading east to Bob Hall Sands.
The maximum wave height into which a Shannon can be launched is unrestricted for a number of practical reasons. The Shannon launch environment is very different around the country. Some such as Dungeness, Hastings, Aldeburgh, are steep shingle beaches where the L&RV hardly gets wet, but the bed is inclined at a steep angle and acts like a slipway propelling the boat into the dumping surf. The instant the bow intakes touch the water, the waterjets kick in to propel it on it's way.
Another scenario is the wide, flat beaches where the L&RV has to wade out to find sufficient depth such as Hoylake. Clearly the wave regime on these beaches is such that the boat can find 1m of water before the tractor / engine unit's intakes at 8ft are inundated.
The RNLI has well over 100 years experience of launching carriage boats from beaches. All this experience has been incorporated into their latest outfits. The criticism on here would suggest that these designs and capabilities have been plucked out of the air by out of touch ivory tower designers. The search for a new launch vehicle was protracted but included all sorts of options including modifying the old Talus tractors and Mersey carriages. About 10 years ago that was tested alongside the prototype L&RV at various sites around the country with the crews of many different boats. The L&RV was found to be superior in every situation and greeted with much enthusiasm by the people who would operate them in earnest. Luckily the RNLI has the funds to put this significant improvement in operational capability into service.
I'm away sailing on a slow mobile connection so cannot watch YouTube videos however...
The point that dear old Sybarite seems unable to grasp is that the RNLI do NOT set fixed limits on the operation of their boats
It's irrelevant what I, Sybarite or anyone else thinks the SLS can or cannot do, nor do design specifications or test results come into it. it's up to the people at the sharp end whether they try to launch or not
So I'll ask again, will you man up and admit you were wrong when you claimed Shannon and the SLS had an operational limit?
The maximum output from the building unit at Poole is 5 or 6 boats a year. 18 boats a year is another made up figure.
Although building the Atlantic hulls is currently done at Cowes there is thought to consolidate all composite work at Poole. The inservice date for some of the Shannon's is well beyond 2019. The idea is to get the production facility to have a consistent and reliable output over the years.
Any criticism of their move to go 'in house' has to be seen against the highly perilous state of the boatbuilding industry in the UK.
Not only are most firms constantly battling viability, but the 'famine or feast' cycle makes it very hard for the RNLI to plan their replacement schedule.
the RNLI decided they need more control of the process.
These figures (Mersey & Tyne) are out of date, (I suspect the RNLI WS is also) Shannon 13-21 is now on trials, upto around 60 will be built, I know of no plans to build more Tamars although it was discussed some time ago. 10 Merseys have been replaced by Shannons. There are 3 station Tynes, one of which will be replaced very soon by a Shannon, the other 2 will go next year. Severns will be modernised under the SLEEP programme' I think the 2019 date for the Mersey replacement has slipped, possibly an example of the over enthusiastic press department or the website is simply out of date. (We always thought it was by 2024, we are not a Mersey station though) A new Shannon allocation was recently announced for Peel IOM with an arrival date of 2021-2. |Refit and repair will keep the ALC busy, Mersey refits are currently carried out there.
I think there's a chance that '2.5 metres' and 'no preset limits are in fact both correct answers but to very different questions.
I'm sure the 2.5m answer is to the question "what is the maximum depth of water a L&RV can be operated?" Well that's simply a function of the height of its air intake. IIRC the Talus tractor could wade to 8 feet in calm water so 2.5m for the new one seems right. As the Shannon can be launched in 1 metre of water on a gently shelving beach, the 1.5 metre margin allows for any white water along the beach edge. If the tractor unit is caught out and abandoned, then battened down it can survive up to 30 feet of immersion which was the same as the Talus as this is the maximum tide depth on the beaches where the L&RV furthest from the HW mark. (I think the max is 3 miles at Hoylake).
The 2.5m is also the maximum wading depth for crossing channels in the sand when taking the boat along the shore to a viable launch site. The Talus at 8 feet could handle the main channel at Wells when heading east to Bob Hall Sands.
The maximum wave height into which a Shannon can be launched is unrestricted for a number of practical reasons. The Shannon launch environment is very different around the country. Some such as Dungeness, Hastings, Aldeburgh, are steep shingle beaches where the L&RV hardly gets wet, but the bed is inclined at a steep angle and acts like a slipway propelling the boat into the dumping surf. The instant the bow intakes touch the water, the waterjets kick in to propel it on it's way.
Another scenario is the wide, flat beaches where the L&RV has to wade out to find sufficient depth such as Hoylake. Clearly the wave regime on these beaches is such that the boat can find 1m of water before the tractor / engine unit's intakes at 8ft are inundated.
The RNLI has well over 100 years experience of launching carriage boats from beaches. All this experience has been incorporated into their latest outfits. The criticism on here would suggest that these designs and capabilities have been plucked out of the air by out of touch ivory tower designers. The search for a new launch vehicle was protracted but included all sorts of options including modifying the old Talus tractors and Mersey carriages. About 10 years ago that was tested alongside the prototype L&RV at various sites around the country with the crews of many different boats. The L&RV was found to be superior in every situation and greeted with much enthusiasm by the people who would operate them in earnest. Luckily the RNLI has the funds to put this significant improvement in operational capability into service.
So they cant manage their web-site? And you would have me believe that they can manage an oh so more complicated project such as a lifeboat?
Having started on 8 knot wooden boats and lived through and experienced the transition to the 25knot boats of today and knowing the opinion of our crew I would say they can. Our coxswain and mechanic spent a week at Poole trialling the prototype of the boat we now have. They and the crew are perfectly happy with it and that is ultimately the most important consideration rather that of one who may never have seen one and certainly never been to sea on one in a gale or above.
When I was talking about project management I was referring to the fact that in 2012 the Shannon was being priced at £1.5m and the trailor at £800k. Now those figures (after only 5 years when price inflation has been negligeable) have grown by 40% and 87.5% respectively to £2.1m and £1.5m.
I have not been in a Shannon but you have not been on the new CTT pantocarene hulled vedette. Measurements were taken to show that this type of hull gives rise to less pitching than the conventional Camarc inspired type hull and is therefore easier on the crew. Whose seats are also dampered.
Indeed I have not seen the new |French boat but I have not criticised it either because not having experienced it would be unwise to do so. Have you been on it seen a Tamar or Severn?
..... I am sure French crews will like their new boats just as our crews like theirs, that is what matters most of all.