| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Uno Ko Anchorage A | 34°29’12″N 133°57’30″E | 0.8 | 15-20 | Mud/Sand (70/30 mix) | 50,000 | 5 vessels (min 0.3nm spacing) | General cargo/Container ships/Bulk carriers | 1. Avoid NW winds >20kt 2. Tidal range 2.5m (max 3.1m springs) 3. No night navigation 4. Minimum 0.3nm clearance 5. Prohibited for vessels carrying Class 1 explosives |
1. Pilotage mandatory >10,000 DWT 2. Bunker supply requires 12hr notice 3. STS operations permitted with prior approval |
| Uno Ko Anchorage B | 34°28’45″N 133°58’15″E | 1.2 | 12-18 (chart datum) | Clay (good holding) | 30,000 | 8 vessels (daylight only) | Coastal vessels/Ferries/RORO | 1. Strong currents during spring tides (max 3.5kts) 2. Prohibited for LPG carriers 3. Daytime use only (0600-1800 JST) 4. Anchor dragging risk during NE monsoon (Nov-Mar) 5. Mandatory anchor watch |
1. 24/7 bunkering available (MGO/IFO) 2. Fresh water supply limited to 100T/day 3. No cargo operations permitted |
| Uno Emergency Anchorage | 34°27’50″N 133°59’00″E | 0.5 | 10-15 (uneven bottom) | Rock/Sand (poor holding) | 20,000 | 3 vessels (max 24hr) | Emergency use only | 1. Requires port control permission 2. No services available 3. Maximum 24hr stay 4. Not charted – use with caution 5. Emergency vessels only |
Not for commercial operations No provisioning available |
| Uno Waiting Anchorage | 34°30’00″N 133°56’45″E | 1.5 | 18-22 | Hard clay | 80,000 | 10 vessels | VLCC/Capesize waiting area | 1. Minimum 0.5nm spacing 2. Deep draft vessels only 3. Tug standby required 4. No discharge permitted |
1. 72hr max stay 2. Bunkering prohibited 3. Prior booking required |
Operational Procedures:
1. Anchoring Protocol:
– Vessels >200m LOA: Dual anchors with 60° spread
– Swing circle: 3 x LOA + 50m (validated by port authority)
– Anchor position reporting every 30 minutes
2. Mooring Standards:
– <150m: 4 shackles (105m) + 1 spare – >150m: 6 shackles (157.5m) + 2 spares
– Chain inspection required before anchoring
3. Port Communication:
– VHF Ch 16/12 (continuous watch)
– Mandatory position reports (lat/long to 4 decimals)
– ETA reporting 24/12/6 hours in advance
Safety Management:
1. Weather Limitations:
– Typhoon warning (wind >25m/s): All anchorages closed
– Gale warning (wind >17m/s): Additional mooring required
– Visibility <1nm: Anchoring prohibited
2. Navigation Hazards:
– Fishing nets: 0.5nm NE of Anchorage B (marked by yellow buoys)
– Submarine cable: 1nm SW of Anchorage A (no-anchor zone)
– Underwater obstructions in Emergency Anchorage
3. Emergency Response:
– Tugs: 2x 3200HP (30min response)
– Oil spill: Dedicated team (1hr mobilization)
– Medical: Helicopter medevac available
Commercial Services:
1. Bunkering:
– IFO 180/380: 500T/day capacity
– MGO: 300T/day (24hr notice)
– LNG bunkering: Not available
2. Provisions:
– Fresh water: 200T/day (prior arrangement)
– Provisions: 24hr delivery (certified suppliers only)
3. Repair Services:
– Hull repairs: Class-approved welders available
– Electrical: Limited to emergency repairs
– No dry dock facilities
Regulatory Compliance:
1. Documentation:
– Port entry declaration (24hr prior)
– ISPS compliance certificate
– P&I insurance verification
2. Environmental:
– No discharge within 12nm radius
– Mandatory garbage logbook
– Ballast water reporting required
3. Customs:
– No crew changes at anchor
– Bonded stores require pre-clearance
Technical References:
1. Hydrographic Data:
– Chart Datum: 1.2m below MSL
– Tidal Stream Atlas: JHA TP-224
– Magnetic Variation: 7°W (annual change 0.1°W)
2. Port Infrastructure:
– Pilot boarding area: 34°28’N 133°58’E
– VTS coverage: 25nm radius
– AIS coverage: 30nm radius
Critical Notices:
1. New underwater pipeline (34°28’30″N 133°57’45″E) – effective 2024-09-01
2. Anchorage B capacity reduced to 6 vessels during winter monsoon
3. Mandatory electronic anchorage booking from 2025-01-01
Official Contact Protocol:
1. Port Control: VHF Ch 16/12 (call sign “Uno Port”)
2. Emergency: Japan Coast Guard VHF Ch 16
3. All communications in English/Japanese
4. No unofficial contact channels published
