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The Baldakin Modular Accommodation System (BMAS) Applications
The Baldakin "Explorer" Cruising Catamaran Presentation
The illustration above shows the top view of a 240' "Explorer" sailing catamaran
The BMAS “Cruising Catamaran” is a project aimed at making cruising cheaper, thereby bringing to the cruising industry a whole new layer of customers, specially the less affluent, younger generation and their kids, who would like to go on a cruise for holidays but could not afford it so far.
Indeed, one of the great advantages of the compact private quarters offered by the BMAS concept can be realized when designing a cruise ship.
Where, more than on a ship, is space scarce and expensive?
Thanks to the BMAS concept, small private quarters allow also the combination of several private quarters in a limited volume, hence the possibility of lodging a large number of people in a small volume.
When typical standard (twin) cabins in existing sailing cruisers range between 90sqft (8.4sqm) up to 195sqft (18sqm) (for Club Med 2, for example), an 8’ twin BC offers full comfort for up to 4 passengers in a 8 x 10’ = 80sqft (7.4sqm) area, i.e. less than half the average standard cabin size found in typical sail cruisers.
Alternatively, when cabin space is a must, a 10’ Twin BC offers even more comfort for up to 4 passengers in a 10 x 10’ = 100sqft (9.3sqm) area, i.e. still about half the average standard cabin size found in typical sail cruisers.
Actually, the intermediate 9’ twin BC would be the recommended size for the larger BMAS cruising catamaran, since it allows for a 4’ space at the end of each BM, which could house all the machinery and equipment, such as the A/C, relating to the whole BM.
The relatively small cabin size should definitely not be seen as a handicap by cruise customers, whatever their age, specially in view of the marine environment and the fact that they will stay only a few days or weeks on board and spend less of their non-sleeping time outside their cabins than inside.
Furthermore, there are several key advantages for the user of a BC over standard cabins: The sound and vibration insulation (specially when motor cruising) and the fact that all the berths are oriented sideward (which makes the sleeping passenger much less disturbed by the boat’s roll, specially when occupying a double bed).
The relative exiguity of these cabins, however compensated by extensive “shared facilities”, means the BMAS cruising catamaran is particularly well adapted for Mini-Cruises, Live aboard fishing/Diving trips, Adventure cruises, Floating classrooms, etc. and shall attract a younger and/or more sporty/active class of customers than the older and/or more sedate/passive clients of today’s cruising ships.
It is to be noted also that, in the larger catamarans, two “BMAS Modules” are usually separated lengthwise by a space of approx 8’ (2.4m) not only to allow for the eventual positioning of lifts, a side entrance or only a view point with balcony, but also for safety reasons, such as the implantation of fireproof doors and stairs and boat emergency exits.
The front tip of each hull, which is fitted with the usual crushable and floating volumes, and the front half can be used as an additional lockable storage and cloakroom for each BC, while the aft half of the lower level of each hull would usually be dedicated to the ship machinery, equipment, tanks, etc…. as well as crew facilities.
The “shared area per guest” ratio is rather high with the BMAS cruising catamarans, where a 10 to 15sqm per guest ratio is obtained.
This allows for some very complete “shared facilities”, as outlined hereafter, more than compensating for the relative exiguity of the BCs (cabins).
The type and size of a BMAS cruising catamaran depends essentially on the required passenger capacity and width (beam) of each hull.
The BMAS system is indeed particularly suitable to design cruise catamarans, thanks to the limited width of the BCs (and, particularly for the larger catamarans, of their face-to-face (F2F) combinations).
One will find hereafter short studies of power and/or sail driven catamarans, ranging from 80’ to 240’ in length, fitted with 2 to 52 BMs, i.e. suitable for 20 to 440 passengers (i.e. crew + guests), based on an occupancy of 2 per twin BC and double these numbers in case the extra berths are used.
It is to be noted that, when a BM is a mixture of 8’ & 9’ or 10’ twin BCs, the 8’ twin cabins, which would usually be affected only to the crew, could be separated from the 9’ or 10’ twin guest cabins by a (fireproof) partition equipped with a door, which could also be fitted between the modules.
We have focused on 4 sizes of catamarans so far, but other dimensions and capacities are of course possible (Note: Stated capacities are based on “twin” BCs with dual occupancy. These capacities can be doubled if the 2 extra berths located in each BC are used):
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