|$3,600,000 Per Vessel ||
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This specification describes the design and construction of the proven reliable, tactically seized, rough sea-going 31M advanced G-Motion hulled aluminium vessel which will be arranged as a Rig Standby Security Craft to be used in coastal and offshore waters, with equipment and ballistic protection capacities to focus on below operating missions: a. Terrorist activities interdiction; b. Coastal defense against illegal activities and smuggling; c. Interception of hostile vessels; d. Fishery control; e. Protecting natural resources against unauthorized exploitation; f. Offshore facilities protection; g. SAR operations; h. Detecting and fighting sea pollution; i. Oil field security and protection; j. Mid-range combat operation; k. Boarding operations. The vessel will be constructed to a high commercial standard with particular attention to minimising noise transference and vibration while enhancing structural rigidity and offering best crew comfort.
|Vessel condition:||Built to Order|
|Vessel type:||Security Vessel|
|Class Notation:||Lloyd’s Register + 100A1 SSC Patrol, G3 Service Group|
|No. of engines:||2|
|Length over all:||31.8m|
|Length at waterline:||31.2m|
|Fuel capacity:||59000 Litres|
|Water capacity:||6200 Litres|
1.1 General Description
This specification describes the design and construction of the proven reliable, tactically seized, rough sea-going 31M advanced G-Motion hulled aluminium vessel which will be arranged as a Rig Standby Security Craft to be used in coastal and offshore waters, with equipment and ballistic protection capacities to focus on below operating missions:
a. Terrorist activities interdiction;
b. Coastal defense against illegal activities and smuggling;
c. Interception of hostile vessels;
d. Fishery control;
e. Protecting natural resources against unauthorized exploitation;
f. Offshore facilities protection;
g. SAR operations;
h. Detecting and fighting sea pollution;
i. Oil field security and protection;
j. Mid-range combat operation;
k. Boarding operations.
The vessel will be constructed to a high commercial standard with particular attention to minimising noise transference and vibration while enhancing structural rigidity and offering best crew comfort.
• LOA: 31.8 m
• Hull Length: 31.2 m
• Waterline Length: 31.2 m
• Hull Beam: 7.0 m
• Depth: 3.2 m
• Draft (hull): Approx. 1.4 m
• Draft (max.):Approx. 1.8 m
• Fuel Oil Capacity: Approx. 59,000 L
• Fresh Water Capacity: Approx. 6,200 L
• Grey Water Capacity: Approx. 1,100 L
• Black Water Capacity: Approx. 1,100 L
• Main Engines: 2 x CAT C32 1081KW @ 2300RPM, C rating engine
• Gearbox: 2 x ZF 3050
• Propulsion: 2 x FPP (fixed pitch propeller)
• Auxiliary Engine: 2 x CAT 4.4 69KW @1500RPM, to be installed in parallel
• Bow Thruster: 1 x SIDE-POWER SH-550 at 380mm tunnel dia.
• Watermaker: 1 x Selmar SYNTHESI SY213 with freshwater producing capacity of approx. 2,640L/day or similar brand of same capacity
• Complement: 52 x passenger + 16 x crew
• Aft Deck Area: 85 m2
• Clear Deck Area: 71 m2
• Deck Strength: 1.5t/m2
• Cargo Deck Load(max.): 25 t
• Ballast Water Tank: 2 x 3.2m3 + 2 x 3.9m3 + 9.7m3 (subject to final design)
• Speed: 26 knots at 25 t deadweight and 100% MCR
23.5 knots at 25 t deadweight and 85% MCR
22 knots at 50 t deadweight and 100% MCR
20 knots at 50 t deadweight and 85% MCR
• Range: No less than 5000 NM at 12 knots and 44 t fuel
• Seakeeping ability: Sea state 6 according to Douglas Scale
• Construction: Marine type 5083 aluminium
• Class Survey: Lloyd’s Register + 100A1 SSC Patrol, G3 Service Group
• Flag State: Nigeria, with IACS Recommendation 99 as applicable regulation to follow
1.2 Design and Attributes
i. Vessel Layout:
The vessel is laid out as per stated in the GA drawings.
Taking in mind for intention of stable, efficient and long voyage navigation to cater all-weather mission availability, the vessel is specially laid out with best available ergonomics and insulations to ensure lowered vibration, improved comfort, better sustained duty-efficiency and mission capability, highlighted as follows:
The bridge house is centrally located to offer a flexible platform for a variety of electronics and 360 deg. of visibility having helmsman seat located on the forward centralline to obtain balanced view from all directions while the fore windows are designed to be forward facing so as to effectively stop the burning sun from directly shining into the console station in tropical, hot summer weather.
The bridge deck layout provides superior walk-around maneuvering quality.
The bow section is designed with one aluminium welded, heavy-duty EVA fender protected boarding access with board rails to run on both sides to secure direct boarding from the wheelhouse and passenger saloon of the vessel onto offshore facilities as shown in the GA drawings.
The engine room is designed with special attention to give a clear height of approx. 2m from the aluminium chequered floor to the ceiling while the soft patched hoisting hatch is positioned on the aft deck section, giving superior accessibility for maintenance and hoisting work when required.
Two units of MOB Scrambling Nets will be supplied having each positioned on the portside and starboard of the aft weather attached to the rescue zones.
ii. Hull Form:
The hull form is registered, patent protected as GMotion Form.
v. Damaged Control:
The hull is divided by five watertight bulkheads to form six sub-divisions to meet class and flag state requirement for damaged stability and will remain afloat and upright with flooding in any single main compartment.
vi. Deck Condition:
The vessel is designed with high freeboard along the waterline length and incorporates with wide, slightly down-angle chine flats and spray rails to ensure a dry deck at all speeds and maneuvering conditions in reasonable sea conditions.
vii. Quality of Comfort:
The hull has been carefully traded off using our technical insight with special attention to quality of confort to ensure the crew and passegers still energetic with high level of mission-concentration even after long-time navigation:
The designed comparably low L/B ratio on the chines (not on the waterline beam as described by many desigers and builders) gives best compromise for stability while still not extreme to specifically care for high level of comfort because too high GM figure caused by too low L/B ratio will bring high frequency but short period of lateral motion, leading to ease of sea sickness.
The well designed deadrise distribution along the waterline length and well controlled trim angle ensures smooth and soft ride in waves so unnecessary to pay much attention to be wasted for keeping balance.
The highly insulated hull structure provides an unrivalled level of capability to absorb energy transmitted from the machinery thus improving quality of comfort.
viii. Strong Bow Protection:
The bow will be structurally reinforced with built-in anti-collission bunlkhead to enhance abbrasion resistance and then to be outer-fixed with heavy-duty EVA fendering in order to ensure that the bow structure can absorb all reasonable loads/impacts transmitted and to give good seagoing abilities for enhanced protection in real world jobs.
The vessel will be designed to provide the following attributes:
1) Shall be sea going and capable of undertaking sea voyages under its own power at any design loaded condition and draught.
2) Shall be capable of working in open waters, regardless of sheltered, unsheltered or open seas with waves upto Douglas state six.
3) Shall offer stable platform with all-around deck manuevering quality around the wheelhouse.
4) Shall be applicable for good day helm visibility.
5) Shall have good manoeuvrability in all defined conditions and low noise at all speeds.
6) Shall offer a structural life span of 20 years under normal operations and reasonable maintenance, allowing for 2000-4000 running hours of average annual usage with unlimited operating hours/ day and 1h/3 hr at rated power operation.
x. Operation Conditions:
The vessel and equipment package will be suitable for operation in tropical weather conditions, detailed as below:
Ambient Air Temp. : Max 40 deg. C
Salinity: Max 42 ppt
Seawater Temp.: Max 30 deg. C
Relative Humidity : Max 90%
Simultaneous extreme conditions : 42 deg. C & 85%RH
As special note, maximum speed at open throttle may be slightly reduced due to impact to performance in maximum power output of the two main engines when at extreme weather with sea water temperature higher than 30 deg. C.
1.3 Compliance and Survey
The vessel is to be surveyed to latest Rules and Regulations for the Classification of Lloyd’s Register, notated as Special Service Craft, patrol, G3 Service Group, with descriptive note as intervention and security craft.
As such, the vessel will be designed and built for patrol mission in restricted service area of waters with reasonable weather as defined by Lloyd’s Register, and generally the range to refuge is no more than 150 nautical miles in winter.
Furthermore, the vessel shall comply with the requirements of main class for stability purposes of the Lloyd’s Register “Rules for the Classification of Special Service Craft” applicable to G3 navigation zone.
As preliminary only and subject to final approval by purchaser, the statutory rule is designed to follow IACS Recommendation 99 for Small Vessels in Commercial Use,
The Builder will appoint an approved Surveyor to carry out survey inspections during construction and testing as per Survey requirements.
1.4 Quality and Control
The shipyard is accredited to ISO 9001:2008 which is certified by RINA and CCS, both are members of International Association of Classification Societies (IACS).
The following documents will be used for the construction of the vessel:
• Design Document Package
• Vessel Specification Document
• Survey regulations as determined.
• Components suppliers documentation.
In the event the drawings differ from this specification, the specification will take precedence.
The particulars and specifications are supplied by the vendor and not SeaBoats. Such information has not been verified and may be incorrect. Please do not rely on particulars and specifications unless you have verified their accuracy.
Note: Indicated location is approximate general area only.