SECTION I-- GENERAL
1 Purpose
1The Vessel is a multipurpose sea-going workship,which should obtain the following roles:
(1)Offshore platform supply（bulk cargo, liquid mud, diesel, fresh water,drill water,drilling equipment and living goods,etc.）；
(2)Anchor handling；
(3)Towing；
(4)External fire fighting
2 Navigation area
The platform supply, loading deck cargo, towing within the prot and stand-by working are to be designed in accordance with the requirements issued by CCS for offshoreservice.
The dispatch sailing and towing on the sea of the vessel are to be designed in accordance with the requirements issued by CCS for open sea service.
3 Type
★The vessel is of oil field stand-by type. The vessel is of full steel welding,transverse system,single continuous deck, with forecastle and three-storeyed deckhouse. Platform deck is under main deck.The Vessel shall be designed to have double bottom double hull except bow. Main deck is flush deck without camber or sheer. The vessel is designed to have rakedbow and cruiser stern. The vessel is driven by two diesel engines, propelled by double adjustable fixed duct paddle. Besides double suspension type rudders, the vessel is equipped with two bowthrusters and one sternthruster. The middle and aft part of the main deck is deck cargo area. Stern towline roller is located on thestern of the main deck.
4 Classification
The vessel shall acquire the following Class Notation by CCS：
★CSA Offshore Tug / Supply Ship，Stand-By Ship,Fire Fighting Ship 1, Water Spraying，Ice Class B
★CSM AUT-0 ，DP2
5 Principal technical parameters
Length overallLoa77.00m
Length between perpendiculars Lpp68.68m
Breadth moulded B18.00m
Depthmoulded D 7.50m
Design draft T6.20m
Load capacity abt. 2500 t
Main deck cargo area650m2
Main deck unit load10t/m2
Main deckcargo capacity1400 t
Ballast/drillingwater tankcapacity 1966m3
Fresh water tank capacity 1054m3
Dieseloiltankcapacity
(including service fuel tank) 1320m3
Cement tank（bulkload）capacity280 m3
Mud tankcapacity450 m3
Main engine continuous rating（MCR） 4000 kW×2
Rated speed750 r/min
Free trial speed16 kn
(draft 5.2m and 100%MCR)
Endurance8000n mile
Self-supplying capacity 30 days
Maximum continuous bollard pull1360 kN
Main generator800 kW×2
Shaftgenerator1600kW×2
Emergency/Harbor generator215 kW×1
Bowthruster unit100 kN×2
Sternthruster unit100 kN×1
Height between decks：
Main deck to Upper deck2.80m
Upper deck to Forecastle deck2.80m
Forecastle deck to Captain deck2.80 m
Captain deck to Bridge deck2.80m
Bridge deck to Compass deck2.80m
Platform deck (from base line)4.40m
Double bottom height1.00m
Sheer：
Sheer forward0
Sheer aft0
Camber：
Main deck0
Deck over Bridge deck0
6 General arrangement
The main deck of the vessel is to be of continuous deck, with forecastle on it. On the forecastle deck there are three-storeyed deckhouses.
Under the main deck, main hull is separated by five watertight transverse bulkheads into six watertight compartments. From bow to stern there are:
(1)FR109 ～ bow №1drill water /ballast water tank.
(2)FR5 ～ FR109 area
Below the platform under deck：
FR100 ～ FR109 is bowthruster tank,equipped with two tunnel transverse thrust units sand one emergency fire pume；
FR73 ～ FR100 is engine room area, equipped withmarine engine equipment like propusion engine (P.) and (S.).
FR69 ～ FR73№1 and №2Diesel service tank are located at the middle line on both sides of this area，FR58 ～ FR69№2 and №3Diesel oil tank & Oil catcher are located at the middle line on both sides of this area；
FR27 ～ FR58Four bulk cement silosare located at the middle line of this area；
FR18 ～ FR27propusion gear box (P.) and (S.), shaft generator are located，FR19 ～ FR23Cleaning water tank is located at the middle line；
FR13 ～ FR18№7 and №8 Fresh water tank are located at the middle line on both sides of this area，FR5 ～ FR13at the middle line of this area an opening is set for going in and out of the sternthruster, and№14 and №15 Drill water/ Ballast tankon both sides.
On the platform under deck：
FR102 ～ FR109 is Store room equipped with sewage treatment unit and vertical ladder and inclined ladder.
FR66 ～ FR102 is engine room area,on port side of which is FR66 ～ FR73 where engine control room is located, on starboard side FR67 ～ FR73 is work shop， FR99 ～ FR102 Electrician room is located on port side, precious spare part room is on starboard side；
№2 and №3Diesel oil tank & Oil catcher are in front of cement tank area，under the platform facing bow bulkhead is FR69，on the platform is FR66，stern bulkhead is FR59；
FR20 ～ FR24№7 and №8Diesel oil tank & Oil catcher are located facing the broadside on both sides，FR16 ～ FR19is №1 rolling tank，FR13 ～ FR16 is №2 rolling tank，FR5 ～ FR12№9 and №10Diesel oil tank & Oil catcher are located at the middle line of this area；cement tank area is facing
the broadside：FR30 ～ FR38№3 and №4 mud tank are on both sides，FR38 ～ FR51№5 and №6Diesel oil tank & Oil catcher are on both sides，FR51 ～ FR59№1 and №2mud tank are on both sides，№1 and №4Diesel oil tank & Oil catcher,under the platform facing bow bulkhead is FR69，on the platform is FR67，stern bulkhead FR59；
(3)Broadside
FR87 ～ FR100№1 and №2Fresh water tank / Ballast tank are located on both sides;
FR78 ～ FR85 on the port side is foam tank，FR73 ～ FR78 on the port side is oil dispersant tank，under the platform FR74 ～ FR85on the starboard side is auxiliary engine lube oil storage tank,on the platform FR74 ～ FR76on the starboard side is hydraulic oil storage tank，FR76 ～ FR85on the starboard side is sanitary sewage storage tank；
№8 and №9Drill water/ Ballast tank are located on both sides of FR59 ～ FR73，№10 and №11Drill water/ Ballast tank are located on both sides of FR46 ～ FR59，№12 and №13Drill water/ Ballast tank are located on both sides of FR35 ～ FR46，№1 and №2 sewage tank are located on both sides of FR30 ～ FR35，№5 and №6 fresh water tank are located on both sides of FR19 ～ FR27，№9 and №10 fresh water tank are located on both sides of FR5 ～ FR13，between which and №9 and №10Diesel oil tank & Oil catcher there is an annular void tank.
Stern～ FR5 area
At the middle line of the areaFR-3 ～ FR5 is steering gear room,№16 and №17Drill water/ Ballast tank are located near the broadside and stern～ FR-3；
(4)Double bottom
№7 and №8 fresh water tank are located at the middle line on both sides of FR13 ～ FR29，FR13 ～ FR17 near the broadside are №1and №2 propeller shaft cooling water tank，
№3 and №4 fresh water tank are located at the middle line on both sides of FR29 ～ FR58，FR29 ～ FR45and FR45 ～ FR58 near the broadside is Drill water/Ballast tankwhosebroadside is connecting up and down，on both sides of FR45 ～ FR58are Drill water/ Ballast tank whosebroadside is connecting up and down，at the middle line on both sides of FR73 ～ FR75 are log room and echo sounder room, near the broadsides are sludge tank, overflow tank and dirty hydraulic oil recovery tank；
At the middle line of FR75 ～ FR81 and FR81 ～ FR87 are dirty fuel oil tank, dirty lube oil tank and bilge well;near the broadsides on both sides of FR75 ～ FR87 are №6 and №7Drill water/ Ballast tank，and main engine lube oil circulating tank (P.) and (S) isolated by the annular void tank. On both sides of FR87 ～ FR97 are №4 and №5Drill water/ Ballast tank, as well as high/low sea water valve box (P.) and (S.) and fire pump sea chest，FR97 ～ FR100bilge water storage tank and bilge well(P.) and (S.) are located，№2 and №3Drill water/Ballast tank are located on both sides of FR100 ～ FR109；
Main deck FR62 ～Bow area is forecastle，main deck FR62 ～ Stern is cargo area, where rails are set to block goods on both sides, wood deck is laid in the middle, whose thickness is 80mm. Stern roller, hydraulic shark jaws,towing pin and drag eye plate are installed on the after main deck.On the aft part of the main deck installed mooring equipment, like hydraulic capstan, bollard and cable chock.
Superstructure
At the middle line of FR67 ～ FR82 of the main deck superstructure is recessed, equipped with towing winch and hydraulic winch, on both sides of the broadsides there are C2H2room,O2room, CO2room, paint room, deck store/power pack. Structure air duct is near the broadside on both sides of FR76 ～ FR82；From bow to stern in the area FR82 ～ FR109 of the main deck there are：chain locker, dry goods store room, laundry/drying room, sauna room, two 6-person rooms and two 4-person rooms, three 2-person rooms, changing room, washroom, engine casing, gateway and interior and exterior stairway, FR109 ～ Bow is №1Drill water/Ballast tank.
From bow to stern in the area FR76 ～Bow of the upper deck there are：
Provision store, boatswain’s store /windlass hydraulic unit room, cold storage buffer room, freezer, cold store, office mess room, crew’s room, recreation room, hull office, engineer’s room, air conditioning unit room, emergency generator room, washroom and gateway,
Structure air duct is near the broadside on both sides of FR76 ～ FR82；lounge with interior and exterior stairway is located on the upper deck (where 100 rescued people can embark).
In the deckhouse on the forecastle deck there are four 2-person rooms, two single rooms, hospital, engine casing, gateway and interior and exterior stairway.
On the fore part of the forecastle deck installed two horizontal combination windlasses, bollard, cable chock, fairleader, chain cable fairlead, chain cable controller, mooring fibre rope wire winch. Two towing posts are installed on the bow.。
On starboard side of the after forecastle deck one high speed FRP rescue boat and handling gear. One electro-hydraulic crane is installed on the starboard side. Inflatable liferafts are provided on both sides.
In the deckhouse of captain deck there arecaptain’s room, chief engineer’s room, chief officer’s room, 1st engineer’s room, battery room, electrician room, engine casing, gateway and interior and exterior stairway.
In the wheelhouse there are navigation control console, chart space, radio space, operating control console, engine casing and interior and exterior stairway.
On the compass deck there is one signal mast, on which installed two radar antenna and navigation light and signal light. On the funnel installed the fire platform on which there are two fire monitors for external fire fighting. Refer to General Arrangement (SHG706-020-02) for details.
7 Main engine and speed
7.1 Main engine
Model：MAN B&W 8L32/40
Type：intermediate speed, four stroke, in line, water cooling, direct injection, exhaust turbo charging, middle cooling, non-reversible, marine diesel engine
Quantity：2
Max.continuous rating power(MCR): 4000kW
Speed：750r/min
7.2 Propeller
The vessel is equipped with 4-bladepropellers with fixed nozzle and adjustable pitch. The hub is made of stainless blade.The structure of this vessel has been strengthened in accordance with the requirement of ice Class B.
Blades： 4
Quantity： 2
Each vessel is provided with one spare blade (P.), one spare blade (S.) and one set of fixed pitch for the blade.
7.3 Gear box
Power of each main engine is passed on to the propeller via long axis, gear box,intermediate shaft and stern shaft.Gear box is two-shaft gear box,main shaft is to drive CPP propeller，while auxiliary shaft to drive the shaft driven generator.
7.4 Speed, oil comsumption and endurance
The sea trial shall be carried out at weather conditions not exceeding wind force 3 Beaufort Scale 3 and sea wave 2, in deep water and level tide, with clean hull and the vessel is at design draft (mean draft=5.2m).
When the main engine is running at100%MCR, the sailing speed is16kn.
Oil consumption: t/day.
When the main engine is running at 85%MCR, with oil&water tanks full and enough food,endurance of the vesselshallnot be less than30 days and not less than 8000 n.mile.
DGPS is adopted to test the sailing speed.
7.5 Bollard pull
When the main engine is working at maximum continuous torque and the speed is 0, maximum bollard pull should be ≥1360kN.
8 Capacity（The table is estimated, which should be subject to the table of tank capacities.）
8.1 Diesel oil tank
No. / Name / Location / Net volume(m3)
1 / №1Diesel oil tank & Oil catcher / 59 ~ 69 / 140
2 / №2Diesel oil tank & Oil catcher / 59 ~ 66 / 96
3 / №3Diesel oil tank & Oil catcher / 59 ~ 66 / 96
4 / №4Diesel oil tank & Oil catcher / 59 ~ 69 / 140
5 / №5Diesel oil tank & Oil catcher / 38 ~ 51 / 203
6 / №6Diesel oil tank & Oil catcher / 38 ~ 51 / 203
7 / №7Diesel oil tank & Oil catcher / 20 ~ 24 / 28
8 / №8Diesel oil tank & Oil catcher / 20 ~ 24 / 28
9 / №9Diesel oil tank & Oil catcher / 5 ~ 12 / 21
10 / №10Diesel oil tank & Oil catcher / 5 ~ 12 / 21
11 / №1 Diesel service tank / 69 ~ 73 / 20
12 / №2 Diesel service tank / 69 ~ 73 / 20
13 / №1 Diesel sump tank / 69 ~ 73 / 28
14 / №2 Diesel sump tank / 69 ~ 73 / 28
Σ / 1072
8.2 Fresh water tank
No. / Name / Location / Net volume(m3)
1 / №1 Fresh water tank/Ballast tank / 87 ~ 100 / 105
2 / №2 Fresh water tank/Ballast tank / 87 ~ 100 / 105
3 / №3 Fresh water tank / 30 ~ 59 / 82
4 / №4 Fresh water tank / 30 ~ 59 / 82
5 / №5 Fresh water tank / 19 ~ 27 / 25
6 / №6 Fresh water tank / 19 ~ 27 / 25
7 / №7 Fresh water tank / 13 ~ 18 / 65
8 / №8 Fresh water tank / 13 ~ 18 / 65
9 / №9 Fresh water tank / 5 ~ 13 / 56
10 / №10 Fresh water tank / 5 ~ 13 / 56
11 / №1Rolling tank/ Fresh water tank/ Ballast tank / 16 ~ 19 / 82
12 / №21Anti-rolling tank/ Fresh water tank / Ballast tank / 13 ~ 16 / 85
13 / Cleaning water tank / 19 ~ 23 / 15
Σ / 848
8.3 Drill water/Ballast tank
No. / Name / Location / Net volume(m3)
1 / №1 Drill water/ Ballast tank / 109 ~bow / 58
2 / №2 Drill water/ Ballast tank / 100 ~ 109 / 12
3 / №3 Drill water/ Ballast tank / 100 ~ 109 / 12
4 / №4 Drill water/ Ballast tank / 87 ~ 97 / 28
5 / №5 Drill water/ Ballast tank / 87 ~ 97 / 28
6 / №6 Drill water/ Ballast tank / 75 ~ 87 / 16
7 / №7 Drill water/ Ballast tank / 75 ~ 87 / 16
8 / №8 Drill water/ Ballast tank / 59 ~ 73 / 123
9 / №9 Drill water/ Ballast tank / 59 ~ 73 / 123
10 / №10 Drill water/ Ballast tank / 46 ~ 59 / 70
11 / №11 Drill water/ Ballast tank / 46 ~ 59 / 70
12 / №12 Drill water/ Ballast tank / 30 ~ 46 / 61
13 / №13 Drill water/ Ballast tank / 30 ~ 46 / 61
14 / №14 Drill water/ Ballast tank / 5 ~ 13 / 25
15 / №15 Drill water/ Ballast tank / 5 ~ 13 / 25
16 / №16 Drill water/ Ballast tank / Stern ~ -3 / 70
17 / №17 Drill water/ Ballast tank / Stern ~ -3 / 70
Σ / 868
8.4 Mud tank
No. / Name / Location / Net volume(m3)
1 / №1 Mud tank / 51 ~ 59 / 120
2 / №2 Mud tank / 51 ~ 59 / 120
3 / №3 Mud tank / 30 ~ 38 / 120
4 / №4 Mud tank / 30 ~ 38 / 120
Σ / 480
9 Bulk cement tank
Four bulk cement silos (each volume is 60m3) are located in the bulk cement tank under the main deck, total is 240 m3.
10 Deck cargo area
The mid and aft part of the main deck is deck cargo area, where rails (2800mm in height) are set to block goods on both sides. In the middle deck imported seeketh mywood deck is laid, whose thickness is 80mm. The total area of the cargo area is 650 m2. Uniform load of the deck is designed to be 10t/ m2，and deck cargo (supplies) of 1400t can be loaded. (Stability Calculation shall prevail.)
11 Mud tank
In the vessel four rectangle mud tanks are located, the total volume of which is 480m3. The steel plate of the tank is to be thickened by 2mm. The base of the stirrer shall be matched.
12 Stability, trim and insubmeribility
As an offshore supply vessel for transporting bulk cargo, liquid mud, fuel oil, fresh water, drill water, drilling equipment and living gooods，its stability shall satisfy the requirements of “Statutory Inspection Technical Regulation for Sea-going Ships Engaged on International Voyages”(2004) for the offshore supply vessel issued by Marine Bureau of People's Republic of China.
As a ship with certain towing capacity, when operating on the sea, its stability shall satisfy the requirements of “Statutory Inspection Technical Regulation for Sea-going Ships Engaged on International Voyages” (2004) for the towing vesselin unrestricted waters issued by Marine Bureau of People's Republic of China.
When loading deck cargo, the stability of the vessel shall be designed according to the requirement of Offshore Service Area.
As a stand-by vessel which can carry 100 rescued persons, its stability shall satisfy the requirements of “Statutory Inspection Technical Regulation for International Sea-going Ships and Offshore Installation” (2004) issued by Marine Bureau of People's Republic of Chinafor the passenger shipin Offshore ServiceArea, on which the passengers gather on one side of the ship.
When sailing under full load and no load, on condition that ballast water is allowed to adjust floating state, the vessel can be with no downpitch, and meanwhile the propeller must be submerged by aft draft.
13 Freeboard
Freeboard of the vessel shall be calculated according to the requirements of the loadline for B Type. Loadline mark shall be assigned at maximum draft (6.40m), at the moment the freeboard value is 1114mm，larger than the value calculated according to the specification.
14 Tonnage
Tonnage of the vessel shall be calculated according to the requirements for Tonnage Measurement：
Gross tonnage GT2990
15 Maneuverability
Two suspension type rudders and two electro-hydraulic rotary vane type steering gears are installed on the vessel.
In order to improve the maneuverability of the vessel, the vessel is equipped with two adjustable pitch four-blade tubular transverse propellers driven by electric motor on the bow, side thrust of each is 100kN; one adjustable pitch four-blade tubular transverse propeller driven by electric motor on the stern, side thrust of which is 100kN.
16 Passenger
Senior officer / 7 personsCrew / 20 persons
Staff / 17 persons
Total / 44 persons
17 Rules,regulations, conventions and certificatse
17.1 Rules,regulations andconventions
At the time of delivery,the Vesselshall ssatisfy the requirements of all the applicablerules and regulations within the period of validityissued by the supervise organizations.
The vessel shall be complied with the requirement of the following Rules:
Rulesand Regulations for the Classificationand Construction of Sea-going Steel Ships (2006)
Statutory Inspection Regulation for Ships and Offshore Installation(2008)
Test Guide of OilRecoveryVessel
Statutory Inspection Technical Regulation for Marine Towage (1999)
Regulation for Survey of Ships under Construction(1984)
Current international conventions and rules:
The International Convention for the Safety of Life at Sea (2004)
The International Convention for Prevention of Pollution from Ships, 1973 and Protocol 1978 and its amendment of 1992
The International Convention for Prevention of Collision at Sea 1972 including amendment of 1982
The International Convention on Load Lines1966
The International Regulation for Tonnage Measurement of Ships, 1969
IMO Resolution 469(Ⅻ): Guardance Document of Design and Constructionof Offshore Supply Ship