Specification for RP.592
The UK and NL are jointly sponsoring a research project (RP592) with
SSRC/Deltamarin having the following objectives:-
1. To prepare outline designs for two new
ro-ro passenger ships, optimized to comply with the new SOLAS regulations (IMO MSC.216(82)) using the latest version of the accompanying explanatory notes (MSC.1 Circ.1226) and including any subsequent improvements arising from discussions at SLF50 in May 2007 and within the current SDS Correspondence Group.
The contractor will be expected to analyze a number of different internal arrangements before deciding on which are likely to be the most vulnerable to capsize in low sea-states. The worst arrangements should then be subjected to more detailed analysis, described in paragraph 2 below. The design criteria for the two vessels are described in 3.1 below.
2. To assess the relative risk of rapid capsize in low sea-states of the two designs following side damage up to the centre-line with due allowance made for water ingress to the long lower compartment and the vehicle deck. Any appropriate methods of analysis may used as long as they correctly account for the water on deck phenomenon as described in the Stockholm Agreement and may include any or all of the following:-
2.1 the static equivalent method (SEM)
2.2 numerical analysis
2.3 physical modelling
Both designs should also be validated against the standard Stockholm Agreement calculation method.
Any other valid methods which may be proposed by the contractor to quantify the possibility of capsize in low sea-states of the two optimized designs will also be considered.
3. Prior to commencement of the design work, an assessment is to be made of the various calculation methods used to determine GZ, particularly in cases of water ingress to the vehicle deck. Consideration should be given to:-
3.1 allowance for draught variation following water ingress and egress
during the flooding process,
3.2 choice of axis of inertia
3.3 an acceptable method for allowing for loss of buoyancy below the
vehicle deck in combination with added weight on the vehicle deck.
4. To prepare a report on the findings for presentation to EMSA and IMO (as appropriate) including any recommendations for improving SOLAS2009 for ro-pax ships (if found necessary).
5. Two separate designs are to be prepared, the first based on the new SOLAS2009 regulations (IMO MSC.216(82)) and the second using SOLAS2009 but with the (s) factors based on equation (9) in SLF 45/3/3 final,i
which recommends use of a TGZmax of 0.25 metres in SOLAS2009 Regulation 7-2.3 instead of 0.12 metres with calculated GZmax not be taken as more than 0.25 metres.
6. Regulation 8-1 covering functional requirements for safe return to port following flooding of any single watertight compartment is to be applied to each design.
7. Both designs are to be optimized to meet the SOLAS2009 regulations and the Intact Stability code and are to have:-
7.1 minimum initial freeboard
7.2 maximum dimensions of long lower compartment (as defined in
MCA Instructions to Surveyors Passenger Ships Classes I, II and II(A)
7.3 least optimal position of long lower compartment within the length
of the ship (usually when the longitudinal centre of volume (LCV) of the
long lower compartment is farthest removed from the LCV of the entire
8. The designs need not necessarily be commercially viable - the project is primarily to confirm the suitability of the new regulations as applied to ro-ro passenger ships – but should take into proper account the dimensions needed to accommodate a reasonable arrangement of passengers, crew, freight vehicles and cars.
The project commenced in January 2008 and is currently expected to be
completed at the end of September 2008.