| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Onoda Outer Anchorage | 34°01’30″N 131°11’00″E | 1.2 | 15-20 | Mud/Sand mix (70/30) | 50,000 | 3 vessels (min 0.3nm spacing) | 1. Waiting area 2. Storm shelter 3. Bunkering |
1. Exposed to NE winds (avoid Nov-Mar) 2. Typhoon season restrictions (Jun-Oct) 3. Currents up to 3.5 knots during spring tides 4. Mandatory anchor watch when winds >20kt |
1. Pilotage compulsory >10,000 DWT 2. Bunkering requires 24h notice 3. Fresh water supply: 50T/hr max |
| Onoda Inner Anchorage | 34°02’15″N 131°10’30″E | 0.8 | 10-12 | Clay (90% density) | 30,000 | 2 vessels | 1. Cargo operations 2. Ship repairs 3. Crew changes |
1. Tidal currents up to 2.5 knots 2. Prohibited for vessels >200m LOA 3. Mandatory AIS transmission 4. No anchoring within 100m of pipeline (marked) |
1. 24-hour bunkering available 2. Fresh water limited to 100T/day 3. Garbage disposal services |
| Emergency Anchorage E-1 | 34°00’45″N 131°12’15″E | 0.5 | 18-22 | Hard Sand (bearing capacity 150kPa) | 20,000 | 1 vessel | Emergency use only | 1. Requires Port Control permission 2. No commercial operations 3. Max 72-hour stay 4. Priority for distressed vessels |
No commercial services available |
| Coal Terminal Anchorage | 34°02’40″N 131°09’50″E | 0.3 | 12-14 | Gravel/Clay mix | 80,000 | 1 vessel | Coal loading operations | 1. Dedicated for coal carriers only 2. Dust suppression required 3. No bunkering permitted |
1. Direct conveyor loading 2. 24/7 operations 3. Max loading rate 5,000T/hr |
Operational Specifications:
- Holding Ground Quality: Outer (Good, 2023 seabed survey), Inner (Excellent, 2024 test), Emergency (Fair), Coal Terminal (Very Good)
- Pilotage: Boarding area 34°01’45″N 131°11’15″E (Outer anchorage NE), transfer via port boat (max wave height 1.5m)
- Tidal Data: Range 3.5m (springs), 2.0m (neaps); HW slack ±1h 15min
- VHF Channels: Ch16 (Safety), Ch12 (Port Control), Ch14 (Pilot), Ch09 (Tugs)
- Prohibited Areas: Within 500m of breakwater, 200m of submarine cable (34°02’00″N 131°10’45″E), 300m of LNG terminal
- Mooring Requirements: Minimum 5:1 scope in Outer, 4:1 in Inner anchorage, 6:1 in Emergency
- Anchor Watch: Mandatory when currents >2 knots or winds >Beaufort 6 (continuous engine readiness)
- Draft Restrictions: Max arrival draft 14.5m (tide dependent)
Regulatory Framework:
- Japan Port Regulations Act Article 34-2 (Anchorage management)
- IMO Resolution A.1045(27) compliance (2024 audit passed)
- MARPOL Annex V special area requirements
- Local Ordinance No. 15-2023 (Environmental Protection)
Safety Equipment:
- Oil spill response station at 34°02’10″N 131°10’20″E (capacity 50T)
- Emergency towage available (2x 60T bollard pull tugs)
- Port medical facility (24/7, doctor on call)
- Diving support for anchor inspections
Critical Operational Warnings:
- Confirm latest NOTAMs via JCG Navtex Station JMH (490kHz) or online portal
- Depth data referenced to Chart Datum (CD) +0.3m (verify tide tables)
- Strict prohibition on anchoring outside designated areas (¥5M fine under Maritime Law Article 56)
- Vessels >10,000GT must submit anchoring plan 12h in advance (Form PA-03)
- Coal carriers require special permit (apply 72h prior)
- Ballast water exchange prohibited within 12nm of port
Additional Notes:
- Anchorage fees: ¥15,000/day for vessels <20,000GT, ¥25,000/day for larger vessels
- Port working hours: 0700-1900 (extended services available with surcharge)
- Nearest ship chandler: Yamaguchi Marine Services (3km from port)
- Customs clearance available 24/7 for anchored vessels
- Weather window restrictions: Operations suspended when waves >2.5m in anchorage areas
