9.1 MOORING ARRANGEMENT
9.1.1 General
The Barge shall encounter three different types of mooring during the intended utilization of the barge:
• Temporary mooring; mooring of the barge by means of a single anchor system after launch
• Quayside mooring; barge lay-up at a miscellaneous quayside, when not used • Load out mooring; barge secured to the quayside longitudinally, with bow or
stern, to enable load out operations.
The mooring arrangement shall be in accordance with Chapter 3, Section 2 of CCS Rules for Sea Going Steel Ships Vol.2 Part 2 (2001).
Reference is made to 0240 CNC 01 006 Barge – Mooring Arrangement – Calculation Report.
9.1.2 Temporary mooring
For temporary mooring a bow anchor shall be provided. The bow anchor shall be housed in anchor pocket with air vent located on the raked bow with protected corners. An inclined hawse pipe shall be provided to lead the anchor chain to the anchor winch mounted on main deck. Just before the collision bulkhead the chain locker as defined in section 6.3.5 will be provided. All corners likely to get in contact with the chain to be suitably rounded in order to minimize chafe.
Ground tackle shall comprise at least 8.7 t stockless bow anchor of normal holding power or 6.5 t anchor of high holding power, 650 m of 73 mm - U3 (OR AMS3) quality anchor chain together with necessary swivels, shackles and anchor chain stopper. The anchor must self stow and flukes and crown shall be within line of shell when stowed.
All equipment shall be certified by Certification Authority.
Anchor shall be lowered and hoisted by an anchor windlass mounted on deck. For the windlass specification reference is made to 9.3.
9.1.3 Quayside mooring
For general lay-up at miscellaneous quaysides four (4) capstans shall be installed on the barge, with 10 t pull capacity. The capstans shall be electrically driven and locally operated from deck. Hauling speed shall be 20 m/min.
As a consequence of the launching procedure the two capstans on the aft shall be able to be submerged.
The aft capstans shall be installed on recessed decks flush with main deck. The forward capstans shall be installed on main deck.
Ten (10) polyester mooring lines of 200 m in length and 52 mm in diameter and 6” circumference shall be provided, with a MBL of approximately 50 t.
Sixteen (16) double bollards - eight (8) on each side of the Barge - shall be provided, with 50 t safe working load capacity. The bollards shall be placed at regular intervals in recesses flush with main deck.
The aft bollards shall be placed on the recessed deck with the capstans flush with main deck. The forward bollards shall be placed on main deck.
Sixteen (16) Panama chocks, eight (8) on SB and eight (8) on PS shall be provided, each accompanying a double bollard. All chocks will be flush with main deck in the recesses, except for the chocks located at the forward bollards.
9.1.4 Load out mooring
Two (2) Smit towing brackets on the aft deck with 200 t SWL shall be provided for securing the barge during load out. Chain tension shall be provided with winch capacity from shore.
Reinforcement in way of brackets shall be provided.
When secured to the quayside in load out operation over the bow, the towing appliances as specified in section 6.3.15 shall be used.
9.2 TOWING ARRANGEMENT
9.2.1 General
Towing and emergency towing equipment the capacities are to be in accordance with Guidelines for Safe Ocean Towing – MSC/ Circ. 884 – 21 December 1998, and Technical Regulations for statutory survey of Ocean Towing 1999, promulgated by the Register of Shipping of People’s Republic of China.
Reference is made to 0240 CNC 01 002 Barge - Towing Resistance - Calculation Report.
9.2.2 Towing gear
Two (2) Bridle 87 mm studlink chains of 45 m length shall be provided. The chain shall be U3 (OR AMS3) quality and end links shall be suitable for shackles. One (1) Fore runner of 15 m shall be provided of same chain. Proof load of the chain is at least 400 t.
The forerunner shall be connected to the bridle chains through a triangular plate of the same breaking strength. The plate shall be installed together with 15 m of 82 mm wire with a breaking strength of at least 450 t.
All connections to be made with steel shackles, MBL 600 t.
The bridle chain shall be lowered and hoisted the anchor windlass mounted on the main deck. For the windlass specification reference is made to 9.3.
One (1) A frame with 25 t SWL shall be provided on the bow for retrieving towing bridle. Connection to deck shall be by means of stainless steel bolts.
9.2.3 Emergency Towing Gear
The PS towing bracket shall be provided with a stud link chain cable. Chain shall be U3 (AMS3) quality, 45 m long and 87 mm diameter and suitable for shackles at both ends.
An emergency towing wire shall be 210 m long with a SWL of at least 450 t, connected to the free end of the chain cable
All connections shall be made with steel shackles, MBL 600 t.
On the free wire end a polypropylene wire of 350 m shall be provided, with plastic buoy and pick up hook. The floating rope shall be coiled up at the aft ship, the emergency towing line (chain and wire) shall be clipped over its entire length on top of the PS gunwale or next to the bollard recesses with clips. Clips shall be provided every 2.5 m and made such, that the wire will not be damaged.
9.3 WINDLASS
One totally enclosed electrically driven anchor windlass shall be provided at the bow on main deck. The windlass shall be of capacity and design to allow for proper self-stowage of steel wire for bridle retrieval, chain cable lifting and warping head handling.
The windlass shall be located on a suitable foundation on main deck subject to Class approval.
The windlass shall be rated for at least the following capacities: • chain cable lifter
• 30 t pulling capacity @ 10 m/min
• 73mm U3 (or AMS3) quality chain cable • wire drum
• 25 t pulling capacity in 2nd layer @ 3 m/min
• 32 mm steel wire, storage capacity at least 100m (indicative drum size: 610mm diameter x 1,000mm in length)
• warping head
• 10 t pulling capacity @ 20 m/min • warping head diameter 450mm
Manual operated band brakes including manual operated spindle emergency shall be provided as well as manual dog-clutches.