| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes | Special Requirements |
|---|---|---|---|---|---|---|---|---|---|---|
| Takuma Anchorage A | 34°14’30″N 133°39’15″E | 1.2 | 15-20 | Mud/Sand (holding power Grade B) | 50,000 | 5 vessels | General cargo/Container ships | Limited swing room; strong currents during spring tides (max 2.8 knots); minimum 6 shackles required | Priority given to vessels with scheduled berthing; 24hr advance notice required | Daylight anchoring recommended for vessels >30,000 DWT |
| Takuma Emergency Anchorage | 34°13’45″N 133°40’20″E | 0.8 | 12-18 | Clay (holding power Grade C) | 30,000 | 3 vessels | Emergency use only | Requires port control permission; poor holding ground in NW winds (≥ Beaufort 6); emergency vessels must maintain engine readiness | No commercial operations permitted; max stay 72hrs without special permission | Mandatory position reporting every 2 hours |
| Takuma Anchorage B | 34°15’10″N 133°38’40″E | 1.5 | 18-22 | Sandy clay (holding power Grade A) | 80,000 | 7 vessels | Bulk carriers/LNG vessels | Exclusion zone: 500m radius during LNG operations; prohibited for vessels carrying hazardous materials Class 1 | Advanced booking required (72hrs notice); additional port fees apply | LNG vessels require standby tug during entire anchorage period |
| Takuma Anchorage C (New) | 34°16’05″N 133°37’50″E | 2.0 | 20-25 | Firm sand (holding power Grade A) | 100,000 | 10 vessels | VLCCs/Capesize vessels | Dedicated for vessels >60,000 DWT; mandatory pilot for approach; depth subject to +2m tidal variation | 48hr pre-arrival notice required; priority given to crude oil carriers | Double anchor deployment mandatory for VLCCs |
Additional Critical Information:
- All coordinates referenced to WGS84 datum (Japan Hydrographic Department Certified)
- Anchorage areas subject to quarterly siltation surveys (last full survey: 2024-03, next due 2024-09)
- Pilotage compulsory for vessels >10,000 DWT (Japan Maritime Law Article 34-2, revised 2023)
- 24-hour VHF monitoring on Channel 16/12/14 (Port Control callsign: JTK1, backup Ch14)
- Typhoon season precautions: June-November (mandatory evacuation when Signal No.8 issued – Japan Meteorological Agency Standard)
- Prohibited anchorage zones marked by yellow buoys with radar reflectors (Chart JP-4321 latest edition)
- Tidal range: 3.5m (spring), 1.8m (neap) – Japan Coast Guard Tide Tables 2024 (Takuma Station)
- Maximum current: 2.8 knots at spring tide (measured 2023-12, JCG Hydrological Survey)
- Anchorage holding power index according to IMO MSC/Circ.1176 standards
- Required equipment: Both anchors operational, minimum 6 shackles on deck (ClassNK requirement)
- Mandatory AIS transmission while at anchor (SOLAS Chapter V Regulation 19.2.8)
- Environmental restrictions: No anchoring within 1nm of marine protected areas (34°10’N 133°42’E)
Safety Reminders:
- Anchor watch mandatory at all times (minimum 1 officer + 1 crew, SOLAS V/19)
- Daily position verification required (GPS log to be maintained for port inspection)
- Immediate reporting of dragging anchor (VHF Ch12 within 5 minutes, JCG requirement)
- Prohibited to discharge any waste in anchorage (MARPOL Annex V strictly enforced)
- Emergency contact: Japan Coast Guard Takuma Station (official details in Admiralty List of Radio Signals Vol.6)
- New requirement: Nighttime illumination of anchor chain (Port Authority Notice 2024-02)
- Vessels >50,000 DWT must submit anchor deployment plan 24hrs before arrival
Operational:
- New dredging project scheduled for Anchorage A (2024 Q4, depth to increase to 22m)
- Increased patrols in prohibited zones (Japan Coast Guard Bulletin 2024-03, 50% more patrols)
- Revised booking system implemented (Port Authority Notice 2024-01, electronic submission only)
- New anchorage fees structure effective 2024-06 (see Port Authority Tariff No.2024-1)
- Additional VTS coverage extended to all anchorages (VHF Ch14 added for large vessels)
