| dc.description.abstract | Sri Lanka is an Island nation and with its geopolitical situation, safeguarding national
interest entrusted with the country’s naval force. Effective surveillance and search in
territorial waters become paramount to deny such threats. United Nations Office for
Drugs and Crimes under its Global Maritime Crime Programme in the South Asian
region has indicated the feasibility to fund a project, if the Navy is capable of design and
build the required boats. The authors being the naval architects in the Navy conducted
an empirical feasibility study to understand and solve the critical success parameters to
design and build the required boat. This study incorporates (a) to estimate the boat’s total
hull resistance at the specified maximum speed, (b) to estimate the total propulsive power
and select the propulsion power package to achieve the maximum speed, (c) to optimize
the Rigid Hull Inflatable Boat dimensional parameters, the centre of weight to improve
performance and stability, and (d) to determine the fulfilment of intact stability criteria of
the design. The total hull resistance at light running condition was 7.1 Kn. The Mercury
diesel Bravo sterndrive unit with model number 4.2 (nominal power 350hp @ 3800 rpm)
was selected as the most suited power package for this application. The length overall and
the amidships beam were 7.5 m and 3.0 m respectively. The boat is capable of a range
of 55 NM, and a maximum speed of 34 Kn. The intact stability fulfils the International
Maritime Organization Intact Stability Code requirements | en_US |
