General description of the vessel :
The Vessel is proposed for conducting multi-disciplinary oceanographic research in the seas around India and regions as far as the Central Indian Basin. It is aimed to serve as a stable platform allowing operation of sensible equipment and underway data acquisition.
1. Main particulars (approx.):
| Length Overall (Hull) : |
80.00 m |
| Breadth Moulded : |
18.00 m |
| Depth up to Main Deck : |
7.30 m |
| Draft : |
4.00 m |
| Speed : |
12.00 Kn. |
2. Complement:
| Officers and crew : |
30 -32 |
| Scientists : |
21 |
3. Accommodation:
Sleeping Accommodation shall be provided for all above complement on different decks as shown in the General Arrangement Plan.
4. Working Deck:
A spacious stern working area of a minimum 250 Sq.m aft of deckhouses, open and as clear as possible from one side to the other is provided. In addition, a working area a minimum of 26 m length of clear deck along one side (starboard) is available. This area will allow for 24-m piston coring and other operations. Adequate width is provided for coring operations and the overall width of deck is sufficient to accommodate all planned operations. One ISO standard container lab is provided. The design provides a dry working deck with provisions for allowing safe access for deployment and recovery of free–floating equipment to and from the water. Low free board is provided as means to accomplish the goal. Deck loading is met to a minimum aggregate total of 60 tons on the main working deck. Point loading for some specific large items is evaluated in the deck design since for loads of 1500 lbs/sq.ft. It is proposed to install one-inch bolt-down fittings on 2-ft centers grid pattern to accommodate portable equipment. Removable bulwarks and railings are to be provided. The working deck shall have connection facility for power, water, air, and voice communication ports.
5. Air conditioning:
All the Accommodation spaces, Laboratories and other public places along with wheelhouse shall be centrally air-conditioned.
6. Cranes:
A suite of modern cranes to handle heavier and larger equipment to reach all working deck areas and offload vans and heavy equipment shall be provided. These include one Articulated Jib Crane at Aft / amidships to handle general purpose scientific gear (SWL 10 tons), one utility loading crane (SWL 3 tons at 5 m outreach) and two forward provision crane of (SWL 1 ton at 10-m outreach). Over-the-side cranes shall be usable as over-side cable Fairleads at sea.
7. Winches:
New generation of oceanographic winch systems providing fine control constant tensioning shall be provided along with wire monitoring systems with inputs to laboratory panels and shipboard recording systems. Local and remote controls shall be provided for the winches. A permanently installed general-purpose winch shall be used for trawling or coring steel wire cable. This will be the general-purpose deep-sea winch capable of handling 25 tons load in sea with a capacity to store 10,000 m of 18 mm Steel Wire Rope (SWR). Additional special-purpose winches may be installed temporarily at various locations along working decks. Winch control station(s) shall be located for optimum operator visibility with reliable Communications to laboratories and ship control stations. Various frames and other handling gear shall be provided over-the-side to accommodate wire, cable, and free handling of launched arrays like seismic cable arrays. These shall be matched to work with winch and crane locations but may be relocated as necessary.
A-Frame : Stern A-Frame to handle ROV, AUV, Submersibles etc., with a safe working load of 25 tons shall be provided. Horizontal clearance to be 6 meters and vertical height to be not less than 8 meters andh an outreach of 6 meters from ship stern. Another ‘A' frame at the ship side (Port) with a safe working load of 5 tons shall be provided for launching the CTD rosettes, water samplers, Grabs and small piston corers. Control station(s) to give operator protection and operations monitoring and be located to provide maximum visibility of over side work. Jib boom of 10-ton capacity and 2 meter outreach is installed on the starboard side for the coring operations.
8. Laboratories:
About 250 Sq. m of laboratory located contiguous to sampling areas, lectronics/Computer lab and associated user space to be located as shown in the GA plan. Labs are located so that they will not be used as general passageways. Access between labs shall be conveniently provided. Labs, Scientific office, storage, and all main deck levels are served by man-rated freight elevator. Labs to be fabricated using uncontaminated and "clean" materials and constructed to be maintained as such. Furnishings, HVAC, door, hatches, cable runs, and fittings shall be planned for maximum lab cleanliness. Fume hoods shall be permanently installed in the Wet and Analytical labs. Cabinetry shall be high-grade laboratory quality (not metal). Flexible lab configurations shall be aided by the use of bulkhead uni-struts, deck hold-downs, and bench tops that can secure a surface of easily replaceable plywood (that can be drilled and nailed into at will). Heating, Ventilation, and Air Conditioning (HVAC) shall be provided appropriate to labs, vans, and other science spaces being served. Labs shall maintain temperature of 21-23 Deg.C, 50% relative humidity, and 9-11 air changes per hour, with individual HVAC controls in each lab. Filtered air shall be provided to analytical labs and compressed gas bottle racks. Each lab area shall have a separate electrical circuit on a clean bus with continuous delivery capability of at least 40-volt amperes per sq. ft of lab deck area. Labs shall be furnished with 110 v and 220 v AC. Total estimated lab power demand is 110 KVA. Uncontaminated sea water supply and clean compressed air supply, free of oil, shall be supplied to labs, vans, and several key deck areas as required.
9. Container lab:
The vessel shall be capable of carrying one standardised 8 ft by 20-ft portable containers,which may be for laboratory, berthing, storage, or other specialised use. Hook-up provision for power, ventilation and air-conditioning, fresh water, uncontaminated sea water, compressed air, drains, communications, data and shipboard monitoring systems shall be provided. Ship shall be capable of loading and offloading container using own cranes limiting their loaded capacity up to 10 tons.
10. Work boats:
One 16-ft inflatable (or semi-rigid) boat shall be provided, located for ease of launching and recovery, specially fitted out for supplemental operation at sea including collecting, instrumentation, and wide-angle signal measurement. This boat shall be in addition to the Lifeboats as per LSA.
11. Storage space:
There shall be a total of 300 cubic meter of scientific storage accessible to labs and Storage weather deck hatch(es). Out of this, half to include suitable shelving, racks, and tie downs; remainder shall be open hold.
12. Acoustics:
The choice of all shipboard systems and their location and installation shall be such that the ship shall be as acoustically quiet as practicable.
The following frequency ranges will be operated from the vessel.
• 4 Hz – 500 Hz seismic
• 3 kHz – 50 kHz echo sounding and acoustic navigation
• 75 kHz – 300 kHz Doppler Current Profiling
The target noise levels to be achieved are as per ISO 6954.
Additional acoustic sensors are listed along with scientific facilities.
13. Under hull fittings / transducers:
The vessel to have the following permanently fitted acoustic transducers and associated equipment.
1) Deep-sea echo sounding system.
2) Navigational echo sounder.
3) Shallow water echo sounder
4) Deep sea Multi-beam precision echo mapping system
5) Acoustic Doppler Current Profiler (ADCP)
6) Salinity, sea surface temperature, and wave sensors
7) Doppler Log, E.M.Log
One Transducer Well (0.5 m) is located forward. One large pressurised sea chest shall be located at optimum acoustic location for at-sea installation and servicing of transducers and transponders.
14. Speed:
The vessel should have a guaranteed speed of 12 knots at fully loaded draft. The vessel to have very high manoeuvrability characteristics with speed control +/- 0.1 Knot in 0-6 Knot range and +/- 0.2 knots in range 6-12 knots.
15. Station Keeping:
The vessel shall be provided with station keeping capability by dynamic positioning as required. Maintain a precision track line while towing at speeds as low as 0.5 knots with a heading deviation up to 45 degrees from the prescribed track line using GPS or bottom navigation as reference. (See navigation and positioning). Speed control along track should be maintained +/-0.1 knot (averaged over one minute interval). Track line requirements should be met 95% of the time considering the range of sea states specified. Maneuverability shall be maintained while working with over the side lines and gear.
16. Towing:
The vessel shall be capable of towing scientific packages up to a total tension of 5 tons at 6 knots, and 10 tons at 2.5 knots in sea states 4 - 5.
17. Fuel capacity:
The Fuel Oil (MDO) shall be provided for 45 days operation on sea. Enough Fresh water and Reverse Osmosis plant shall be provided. The approximate capacity of Fresh water and fuel oil is as follows:
Fresh Water Capacity : 270 t
Fuel Oil Capacity : 600 t
Adequate space for storing provisions to be provided for an endurance of 45 Days.
18. Navigation and Positioning:
Ship shall have ECDIS & GPS, GPS attitude determination to 0.1 degree or better, short base-line acoustic navigation system, "dynamic positioning" capability to maintain the ship on station or on track line to the station keeping specifications under automatic control and appropriate navigational reference.
19. Internal Communications:
Internal communication system providing high quality voice communications throughout all science spaces and working areas. Optical fiber Ethernet cabling and connections shall connect all science spaces including staterooms, labs, and key working areas. Data and power cable races shall be kept separate and as far from each other as possible. Provide closed circuit television monitoring and recording of all working areas including subsurface performance of equipment and its handling. Monitors for all ship control, environmental parameters, and science and over side equipment performance shall be provided in all, or most, science spaces.
20. External communications:
The vessel shall be provided with
1. Reliable voice channels for continuous communications to shore stations other ships, boats,
and aircraft. This includes satellite, VHF, HF and UHF
2. Facsimile communications to transmit high-speed graphics and hard-copy text on regular
schedules
3. High-speed data communications (56 K baud) links to shore labs and other ships on a continuous basis.
21. Satellite Monitoring:
The vessel shall carry transponding and receiving equipment including antenna to interrogate and receive satellite readouts of environmental remote sensing. Satellite antennas and the GPS-attitude sensor should be positioned with a reasonably clear view of the sky and adequate distance from radar and other ship antennas.
22. Ship Control:
Chief requirement is maximum visibility of deck work areas during scientific operations and especially during deployment and retrieval of equipment. This may require additional or portable control stations besides the bridge-pilot house. The functions, communications, and layout of the ship control station(s) should be designed to enhance the interaction of ship and science operations. The ship course, speed and positioning will often be integrated with scientific operations requiring control to be exercised from a laboratory or working deck area.
23. Subdivision:
The vessel shall be divided into six watertight compartments as shown in the GA. Watertight
doors shall be provided on the watertight bulkheads in accordance with the rules as required.
24. Machinery:
The machinery to built to classification and statutory regulations. The propulsion is by steerable thrusters of about 800 KW input power. One number Pump Jet thruster of about 700 kW input power to be installed forward. Basing on Dynamic Positioning requirement additional aft thruster may be provided. Diesel electric propulsion system to be installed. 3-nos. 1250 KW diesel generating sets capable of parallel operation, 350 KW harbour genset and one Emergency genset of 350 KW are to be installed. Adequate number of bilge and fire pumps to be provided as per regulations. The emergency fire pump will be electrical motor driven with supply from emergency generator. The generators are to be provided with compressed air starting mechanism. Control and instrument air to be separately provided. Adequate arrangements shall be provided for efficient lubrication of all running machinery. Provision to be made for purifying the lubricating oil from the generators using batch processing. An EVAC type sanitary discharge system will be provided. A chemical type Sewage Treatment Plant of sufficient capacity to be provided. One fresh water generator working on reverse osmosis principle of 10 tons /day capacity is provided.
25. Classification:
The Vessel with all equipment and machinery shall be designed and constructed, in accordance with the IMS passenger vessel rules, SOLAS & MARPOL requirements. An efficient vessel control system will be provided confirming to UMS and one-man bridge operation requirements. Dynamic positioning will confirm to IMO class I or equivalent requirements.The Life saving appliances, Navigational aids, Fire fighting appliances and the light & sound signals shall conform to the requirements SOLAS. Survey Certificates, Certificate of Class, Registration Certificates, Life saving, fire fighting appliance certificates and all other necessary certificates for the proper operation of the vessel shall be forwarded to the Owner at the time of delivery as part of the contract.
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