7.1 Das Island Terminal
Crude Oil, LNG, LPG, Paraffinc Naptha and Sulphur
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7.1.01 Tanker berth no. 3
This is a single point mooring (SPM) facility situated approximately 2,285 metres east of DAS Island. The buoy is moored in 28.25
metres of water at datum, and is served by a 48” crude pipeline.
Vessels are required to be fitted with a hose handling crane / derrick capable of plumbing overside for the full length of the manifold
with a minimum safe working load of 15 TONNES OR AS PER OCIMF WHICHEVER IS GREATER SWL. (Ships Max DWT up to 100,000 MT Crane 10 Tons)
Berth limitations
The berth is capable of accepting Vessels up to 360,000 M/T displacement subject to the following limitations:
| Maximum berthing draft |
22.0 metres |
72 feet |
| Maximum sailing draft |
24.0 metres |
79 feet |
| Maximum length overall |
337 metres |
1106 feet |
| Minimum length overall |
185.0 metres |
607 feet |
| Maximum freeboard |
21.5 metres |
71 feet |
| Manifold location |
Midship, Portside |
|
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7.1.02 Tanker berth no. 6
This is a single point mooring (SPM) facility situated approximately 5,130 metres south-east of Das Island.
The buoy is moored in 25.2 metres of water at datum, and is served by a 48" crude pipeline.
Vessels are required to be fitted with a hose handling crane/derrick capable of plumbing overside for the full
length of the manifold with a minimum safe working load as follows:
| < 100,000 DWT |
10 tonnes |
| 100,000 to 300,000 DWT |
12 tonnes |
| > 300,000 DWT |
15 tonnes |
Berth limitations
The berth is capable of accepting Vessels up to 360,000 MT displacement subject to the following limitations:
| Maximum berthing draft |
18.50 metres |
72 feet |
| Maximum sailing draft |
21.0 metres |
79 feet |
| Maximum length overall |
337 metres |
1106 feet |
| Minimum length overall |
185.0 metres |
607 feet |
| Maximum freeboard |
21.5 metres |
71 feet |
| Manifold location |
Midship, Portside |
|
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7.1.03 Mooring Arrangements
Mooring arrangements are in accordance with OCIMF standards, using a single hawser only. The mooring uses a 76 mm diameter
chafe chain and all Vessels must be fitted with bow stoppers and fairleads of 76 mm chain as recommended
by OCIMF for mooring ships at single point moorings.
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7.1.04 Loading Rates
The SPM is fitted with two 20 inch floating hose strings which terminate in 16 inch tail hoses
with 16 inch ASA flanges. The maximum loading rate available at the berth is 60,000 bbls/hour.
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7.1.05 Control of Loading and Safety at Tanker Berth no. 3 & 6
- Two Loading Masters and two Divers will remain on board the vessel throughout its stay at the berth and will coordinate the loading
operations with the shore control room.
- Loading operations must be carried out in accordance with a pre-declared plan which has been discussed with the Loading Master.
- The Loading Master will (in conjunction with ship’s staff) carry out inspections and complete the “ship / shore
safety checklist”. Failure to observe conditions of the checklist may result in the ship being removed from the berth.
- Changes in loading rates must be communicated to the Loading Master in sufficient time to allow him to contact the shore control
room.
- In the event of an emergency, loading operations may be stopped by the use of the remote control box by the loading
Master, or by contacting the shore control room on the ADMA VHF radio.
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7.1.06 Berth no. 4 - LNG/LPG and Paraffinic Naphtha
This is a fixed platform berth situated in
Lat. 25° 09’ 22” N, Long. 052° 53’ 08” E
It is an ADGAS installation for the transfer of LNG / LPG and related products. Movements of Vessels to and from the berth are governed
by the Port Authority. The berth is a T-head type, with Vessels berthing port side alongside. The berth is accessed by a walkway / pipe
track and distanced some 700 m out from the shoreline.
Berth limitations
Capable of handling Vessels up to 100,000 L/T displacement, subject to the following:
| Maximum length overall for LNG and Paraffinic Naphtha Vessels |
300 m. |
| Maximum length overall for LPG carriers |
260 m |
| Maximum draft |
13.50 m |
| Minimum length overall for LNG carriers |
180 m |
| Minimum length overall for LPG carriers |
140 m |
| Minimum length overall for Paraffinic Naphtha carriers |
135 m |
| Minimum draft permitted alongside is |
2.7 m or 9 ft |
| Minimum depth of water alongside |
14.95 m. at CD |
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7.1.07 Moorings
| Moorings |
Head |
Breast |
Spring |
| LPG World Class of 79,900 m3 |
Forward |
2 |
2 |
2 |
| Aft |
2 |
2 |
2 |
| LNG Carriers up to 125,000 m3 |
Forward |
2 |
3 |
2 |
| Aft |
2 |
3 |
2 |
| LNG Carriers 125,000 m3 up to 135,000 m3 |
Forward |
2 |
4 |
2 |
| Aft |
2 |
4 |
2 |
Once moored, ships fitted with automatic tension winches should not use such winches in the automatic mode.
Mooring lines must not be left on the winch drum and must be wire or equivalent types.
MOORING – DAS ISLAND BERTH No. 4
MOORING – DAS ISLAND BERTH No. 5
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7.1.08 Loading Rates
Loading of LNG/LPG, Paraffinic Naphtha and associated products is the responsibility of ADGAS.
| Maximum LNG loading rate |
10,000 m3 / hr |
| Maximum LPG loading rate |
2,500 m3 / hr |
| Maximum Paraffinic Naphtha loading rate |
2,200 m3 / hr |
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7.1.09 Control of Loading / Discharge and Safety
Loading operations must be carried out in accordance with a pre-declared plan which has been discussed with ADGAS representative.
ADGAS representative will, in conjunction with ship’s staff, carry out inspections and complete the “Ship / Shore Safety
Checklist”. Failure to observe the conditions of the checklist may result in the ship being removed from the berth.
In the event of an emergency, loading operations may be stopped by the use of emergency shut-down (ESD) ship/shore linked systems or
by contacting ADGAS shore control room on the ADGAS VHF radio.
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7.1.10 Berth no. 5 / Sulphur Jetty
This is a fixed platform berth situated in Lat. 25° 08’ 09”, Long. 052° 53’ 02” E.
Berth No. 5
is designated to load molten sulphur.
Vessels berth alongside two flexible dolphins provided with suitable fendering and four mooring dolphins are provided to accept
moorings of up to 60 tonnes breaking strain.
Berth limitations
| Maximum arrival displacement at the berth is |
16,000 tones. |
| Maximum LOA |
150 m |
| Maximum draught |
10.0 m |
| Range of manifold height above water level minimum |
1.6 m |
| Maximum |
11.7 m. |
| Maximum bow to manifold distance is |
64 m |
| Minimum depth of water alongside is |
1 0 m |
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7.1.11 Moorings - Minimum Requirements
| 2 head lines |
to |
MD4 |
| 2 breast lines |
to |
MD3 |
| 2 back spring |
to |
BD2 |
| 2 forward springs |
to |
BD1 |
| 2 breast lines |
to |
MD2 |
| 2 stern lines |
to |
MD1 |
Wires or low stretch synthetic moorings only are permitted. Moorings which are reel-mounted shall
be secured by the winch brake. Self-tensioning winches may not be used in the self-tensioning mode
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7.1.12 Loadings
An 8” marine loading arm fitted with a Camlok coupler is provided, heat traced and fully insulated.
Maximum loading rate is 700 m³ per hour.
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7.2 Zirku Island Terminals
7.2.01 Location
The terminal of ZIRKU Petroleum Port is located at about 8 nautical miles NNE of ZIRKU Island and consists of two single point mooring
buoys which are positioned as follows:
- SPM A
25° 00’ 32” N 052° 59’ 02” E
- SPM B
25° 01’ 36” N 052° 59’ 30” E
SPM Description: Both the buoys are identical.
Buoy Body: - The buoy hull is a circular steel structure, the diameter of which is approximately 12.5 metres with a
rotating assembly. The colour is orange.
Hoses: The buoy is equipped with two strings of 20” floating hoses with a 16” tail end hose connection.
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7.2.02 SPM A
The outer hose string is 328 metres and the inner one 317 metres.
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7.2.03 SPM B
The outer hose string is 316 metres and the inner one 305 metres.
Each string is equipped with winker lights.
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7.2.04 Hawser
The buoy is fitted with navigation light emitting a “U” flashing signal every 15 seconds visible over 360° to up to a
5 nautical miles range.
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7.2.05 Fog Horn
The fog horn fitted on the buoy emits a “U” blast every 30 seconds and is activated when necessary by a
remote control system.
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7.2.06 Radar Reflector
A radar reflector is installed on the buoy structure.
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7.2.07 Water Depth
The minimum water depth in the vicinity of the SPM buoys is 27 metres above sea-bed. Maximum departure draft allowable
is 21 metres.
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7.2.08 Size of Tankers Accommodated
The SPMs are suitable for berthing tankers from 30,000 DWT. up to 350,000 DWT. loaded at 80% of their capacity.
The maximum trim for manoeuvring in ballast is 3 (three) metres/stern.
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7.3 Mubarraz Island Terminal - ADOC (Crude Only)
Tanker loading is accomplished by means of a Single Point Mooring (SPM) system installed about 8 miles offshore east of the Island.
Size of Tankers accommodated: The SPM is suitable for tankers up to 330,000 MT SDWT, the maximum trim manoeuvring is 3
(Three) meters by the stern
A general layout of the Terminal is shown on Exhibit “A”.
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7.3.01 Berth and Loading Operation
General Description of Berth
Position of Berth (SPM)
Lat. 24° 26’ 05. 1” N,
Long. 053° 31’ 35. 9” E
Depth of Water
16.5 meters (55 feet)
Type of Berth
The berth is a single point mooring system consisting of a buoy 50.83 feet (15.25 meters) in diameter, moored to six pendant legs of 3”
high strength chain shackled to anchor piles at a radius of 1100 feet (330 meters), and having a rotating deck carrying the pipeline and
mooring connections.
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7.3.02 Moorings
Attached to the mooring connections on the berth are two 18” Nylon double braided ropes (144 mm dia. calculated breaking strength
440 Tons). These ropes are 60 metres long, and have at their free end a length of stud link chain, which includes enlarged end link for
fixing to the chain stopper on the deck of the tanker. From the outer end of this chain there are connected two mooring lines consisting
of pick-up ropes and a towing rope (port side only) as shown as Exhibit “B”. The nylon rope is supported by lace floats and the
chain is hung by polyurethane buoy 1.5 m in diameter.
Picked up two mooring chains on forecastle are made fast by vessel chain stoppers. The size of the Panama hole should be at least 300 mm
diameter applied with OCIMF standard
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7.3.03 Submarine Pipe-Lines and Hoses
One 32” crude oil line has been laid approximately 52,500 feet (16 km) from the shore to position close under the buoy. From the
underwater manifold the crude oil goes to the buoy through a 20” underwater hose. The connection between turret piping of
SPM and tanker manifold consists of one hose string composed of 24” & 20” x 875’ floating hoses and
two hose strings composed of 16” x 180’ tail and tanker rail hoses.
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7.3.04 Loading Rate
The maximum loading rate of crude oil is 34,000 bbls/hr or 5,400 kl/hr. Normal loading rate is
(5,400 kl/hr).
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7.3.05 Terminal Support Vessels
Following Vessels are always available for use for marine operations at this port.
| Type of Vessel G.R.T |
B.H.P |
SPD (KTS) |
| TUG/Work Boat 462.00 |
3,000 (1,500 x 2) |
10 |
| LINE BOAT 3 71 |
480 (240 x 2) |
|
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7.4 Sas Al-Nakhl Petroleum Port General Information
7.4.01 Sas Al-Nakhl Berths
Loading Terminal consists of two berths, each of which accommodates Vessels in the range of 5,000 to 30,000 DWT and is
provided with the following facilities:
- Loading platform
- Four mooring dolphins
- Five breasting dolphins
- Four 60 T quick release hooks with capstan
- Two 30 T bollards
- Hydraulically operated gangway
- Two fire fighting monitor towers
Each platform is provided with six loading arms having the following flexibility.
(See terminal plan).
| No. |
Size of flanges (inches) |
Cargo Flexibility |
Max. Rate (m3 / hr) |
| 1 |
6 |
Lube oil |
400 |
| 2 |
8 |
A.T.K. (Jet Fuel) |
1,000 |
| 3 |
6 |
Unleaded Gasoline (Mogas) |
500 |
| 4 |
8 |
Leaded Gasoline (Mogas) |
1,000 |
| 5 |
10 |
Gas Oil / Naphtha |
1,500 |
| 6 |
10 |
S. Run Residue |
1,000 |
The loading arm numbers are from the gangway side
SAS AL-NAKHL Refinery jetties are equipped with navigational aids to allow safe navigation during day and night, namely:
- Two white coloured leading lights to affix navigation for channel’s centre line, placed ashore at 5.0 M and 11.0
M above the ground level.
- Six navigation station lights with radar reflectors to define basin limits.
- Each jetty is provided with four red coloured lanterns two at each end at 5.0 M above deck level. This is in
addition to the operational flood lights.
- Each mooring dolphin is provided with proper flood lighting.
Note: Presently, navigation is restricted to daylight hours only.
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7.4.02 Sas Al-Nakhl Loading and Unloading
- The master must give the terminal a “stand by” warning 10 minutes before being ready to commence
loading or discharging.
- Upon “COMMENCE LOADING” from the Master or his deputy only one pump will be used to ensure a slow flow
rate until it is established that all systems are operating correctly and pressures are constant. Full loading rate may then be
ordered.
- The vessel cargo tanks shall be inspected prior to and during loading and should it be found that the tanks are not tight all
loading shall cease, the vessel be rejected and further loading refused. The vessel will not be accepted later until satisfactory
evidence of repair is produced duly certified by ABS, LLOYDS or other officially accredited classification society
or surveyor.
- During the hours of darkness, Vessels loading / discharging products lube oil or ballast shall rig overside lights
to illuminate the surface of the sea around the ship to the Terminal Operators satisfaction to ensure that any oily products on the
surface may be detected quickly and early action taken as appropriate.
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