| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Maizuru Outer Anchorage | 35°28’30″N, 135°22’00″E | 1.2 | 20-30 | Mud/Sand | 50,000 | 5 vessels | Waiting/emergency | 1. Exposed to NW winds; avoid typhoon season (June-Nov). 2. Prohibited during naval exercises (Japan Coast Guard Notice 12/2023). 3. Mandatory 500m separation from LNG carriers at anchor. |
1. Free anchorage; no service fees. 2. Bunkering available via prior request (48h notice). 3. No waste discharge permitted (MARPOL Annex V). |
| Maizuru Inner Anchorage | 35°27’00″N, 135°23’30″E | 0.8 | 15-20 | Clay | 30,000 | 3 vessels | Bunkering/shelter | 1. Limited swing room; pilot required for vessels >100m LOA. 2. Mandatory AIS transmission (IMO SOLAS Ch.V). 3. Night anchoring requires deck lighting per COLREGs. |
1. Prior permission required (24h notice). 2. Freshwater supply (200T/day max). 3. Slop reception available at adjacent wharf. |
| Tango Anchorage | 35°29’15″N, 135°20’45″E | 0.5 | 10-15 | Sand | 10,000 | 2 vessels | Coastal vessels | 1. Shallow draft only (max draft 9m). 2. Avoid during peak fishing seasons (May-Sep). 3. Prohibited for vessels carrying Class 1 dangerous goods. |
1. Fishing zone within 0.5nm – maintain 1km clearance. 2. No commercial services; nearest repair facility at Maizuru Ko. |
| Nishi-Maizuru Emergency Anchorage | 35°26’45″N, 135°21’15″E | 0.3 | 12-18 | Gravel | 20,000 | 1 vessel | Emergency repairs | 1. Strictly for emergencies (engine failure/flooding). 2. Notify Port Control immediately via VHF Ch.16/12. 3. Tug assistance mandatory for vessels >5,000 DWT. |
1. No commercial use permitted. 2. Emergency repairs limited to 72h without extension approval. |
| Higashi-Maizuru Holding Area | 35°27’50″N, 135°24’10″E | 0.4 | 18-22 | Mud | 40,000 | 2 vessels | Pre-berthing | 1. Maximum stay 24h without approval. 2. Requires continuous VHF watch on Ch.14. 3. Prohibited for vessels with cargo operations underway. |
1. Free for vessels with confirmed berthing schedule. 2. Bunker barge access requires 12h notice. |
Comprehensive Additional Information:
- Pilotage & Navigation:
- Compulsory for vessels >500 GT; pilots board at 35°28’00″N, 135°22’30″E.
- Pilot transfer requires Beaufort scale ≤5 and daylight hours (sunrise-sunset).
- Electronic Chart Display (ECDIS) mandatory for vessels >3,000 GT per SOLAS.
- Tides & Currents:
- Mean tidal range: 0.5m (max 0.8m during equinoctial springs).
- Currents: 1.5 knots max during spring tides (Japan Hydrographic Department Chart JP 125A).
- Tsunami evacuation protocol: Proceed to >50m depth when Alert Level 3 issued.
- Regulations & Compliance:
- Anchoring prohibited in marked areas: Submarine cables (Chart W125), pipeline zones (MMAJ Notice 2021-5).
- Vessels >10,000 DWT must submit stability calculations to Port Authority 6h pre-arrival.
- Ballast water exchange prohibited within 12nm of coast (Japan MERA Ordinance).
- Emergency Services:
- Medical evacuation: Japan Coast Guard MRCC Osaka (VHF Ch.16/70) – helicopter medevac available.
- Oil spill response: Maizuru MPCC (Marine Pollution Control Center) – 1,000T capacity.
- Diving operations require Port Master approval (48h notice for commercial divers).
- Weather & Operational Limits:
- Winter restrictions: NW monsoons (Dec-Feb) may require anchorage repositioning when winds >25kt.
- Typhoon preparedness: Mandatory 72h bunker reserve during June-Nov.
- Real-time updates: JMA NAVTEX (518kHz) and online portal (jma.go.jp).
- Port Services & Logistics:
- Bunkering: Available at Inner Anchorage (IFO 380cSt, MGO; 24h notice).
- Repairs: Limited hull repairs at Nishi-Maizuru quay (certified for up to 5,000 DWT).
- Provisions: Available within 2h notice (fresh produce subject to phytosanitary checks).
