Feature 1 | ADVANCED HULLFORMS
helicopters; have cargo handling State 6 for transit, fuelling, and boat
facilities for up to five Twenty Foot launch and recovery; Sea State 5 for
Equivalent Units (TEU); and have full boarding operations; and Sea State 3
propulsion redundancy. for helicopter operations. The required
AOPS is being designed to have seakeeping requirements were found
a strong balance of capabilities to be feasible with limited slamming,
between icebreaking, seakeeping, wetness, and motion induced
manoeuvrability, and powering interruptions, no propeller emergence
performance. A diesel-electric Azipod and no operational restrictions.
propulsion system has been identified The proposed lifesaving equipment
as providing the best ice capability is compliant with IMO Code of Safety The landing craft is stowed below the flight
and operational flexibility. The for Special Purpose Ships 2008 and deck and deployed via telescoping davits.
machinery is based on 2 x 7,500kW Guidelines for Ships Operating in
pods and a quartet of 4,500kW diesel Arctic Ice Covered Waters, and is based
gensets, providing full propulsion on 2 x SOLAS-approved rescue boats continually manned when ship is at
system redundancy. and 2 x 70-person lifeboats. Lifeboats sea. Use of COTS equipment will be
A twin screw geared diesel being suitable for Arctic evacuation and maximised, and the design is intended
mechanical propulsion system provides survival in compressive ice fields would to promote efficient use of limited
a lower-cost alternative, and would be desirable but, according to McGreer, manpower resources with minimal
make use of 2 x 4.25m controllable pitch may not be available. software development, utilisation of
(CP) propellers; 2 x dual input – single The definition design vessel is multi-function workstations, and a
output reduction gears (approximately equipped with a landing craft suitable communications system integrated
4.4:1); 2 x (4.5MW and 3.3MW) diesels for carrying cargo, small vehicles and with a Local Area Network (LAN) all
in a father and son arrangement; 2 x personnel ashore, the landing craft being specified.
1.3MW diesel gensets for ship service being stowed below the flight deck and The gun-only armament would take
power; and 2 x 1MW electric motors deployed via telescoping davits. the form of stabilised weapons capable
for very-slow-speed operations; and The definition design also includes of being fired remotely, the primary
would also provide full propulsion a 12m boarding boat, which would be gun weapons system being 20-40mm.
system redundancy. required to operate in up to Sea State 5. A 40mm gun has been selected for
The seakeeping requirement for Several off-the-shelf options have been definition design, and would be
the AOPS is, of course, potentially investigated, although there is currently augmented by small-calibre gun(s)
challenging, due to the combined no Commercial off the Shelf (COTS) for self protection (12.7mm guns were
performance requirements in open boarding boat available that meets all selected for definition design).
water and ice, and has been analyzed the SRD requirements. In terms of cargo handling equipment,
using the ShipMo PC software. The definition design vessel concept the AOPS definition design is equipped
Retractable active fin stabilisers are is also equipped with aviation facilities to handle and stow:
likely to be incorporated into the to support:
•
Up to five containers – one of which
design, which is being evaluated against
•
Landing, stowing, refuelling and is up to 30tonnes
NATO STANAG 4154. The seakeeping minor maintenance of a Bell 212 or
•
A BV 206 amphibious transport
requirements were evaluated at Sea 412 helicopter
•
Ship’s vehicles including snow mobiles
•
Landing, stowing, refuelling, and and a pick-up truck
minor maintenance of a CH148
•
Ship’s stores for 120-day mission
TechnicAl pArTiculArs Cyclone
AOPS Main Particulars
•
Landing and refuelling of a CH149 The ship’s crane has the capability
length, oa .........................................109.6m Cormorant to handle all of the ship’s cargo up to a
length, wl ..........................................101.1m weight of 10tonnes at a distance of 10m
length, bp ...........................................98.6m The definition design has a flight from the ship.
Breadth ................................................18.2m deck, fixed hangar, flight deck fire Areas of focus for further definition
Breadth, wl ..........................................17.6m fighting capabilities, and night/limited- d e s i g n d e v e l o p m e nt i n c l u d e :
Displacement ..................circa 6,940tonnes visibility flight control capabilities. It is construction cost assessment; mission
Volume .............................................6,771m
3
not currently equipped with a haul down systems; structural design requirements;
Wetted surface ................................2,323m
2
system. Flight operations are required balance of capability between open
Midship area ....................................113.9m
2
up to Sea State 3. water and ice performance; propulsion
Waterplane area .............................1,529m
2
AOPS is a naval ship but is machinery options; requirements for
lcB (aft of Fp) .....................................49.7m not considered a combatant, and boarding boats and landing craft; and
the operations room will not be model tests. WT
14 Warship Technology March 2009
WT_Mar09_p12+13+14.indd 14 3/5/09 5:21:26 PM
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