| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Tokachi Outer Anchorage | 42°15’00″N, 143°20’00″E | 2.5 | 20-30 | Mud/Sand | 50,000 | 5 vessels | Waiting/Storm Shelter | 1. Exposed to NE winds 2. Typhoon season restrictions (June-Oct) 3. Minimum 500m separation required |
1. Pilotage mandatory 2. No bunkering operations permitted |
| Tokachi Inner Anchorage | 42°13’30″N, 143°18’15″E | 1.2 | 12-18 | Clay/Sand | 30,000 | 3 vessels | Cargo Operations | 1. Limited swing radius (300m) 2. Tidal currents 1-3 knots 3. Daytime operations only |
1. Bunkering via barge (72h notice) 2. Fresh water available |
| Obihiro Anchorage | 42°17’45″N, 143°22’30″E | 1.8 | 15-25 | Gravel/Sand | 40,000 | 4 vessels | Fishing Vessels | 1. Priority for local fleet 2. Night navigation prohibited 3. Ice season restrictions (Dec-Mar) |
1. Ice-class requirements 2. Fish processing support available |
| Tokachi Emergency Anchorage | 42°14’15″N, 143°19’30″E | 0.8 | 10-15 | Rock/Mud | 20,000 | 2 vessels | Emergency Only | 1. Strictly distress situations 2. Immediate JRCC notification required |
No commercial operations permitted |
| Tokachi Quarantine Anchorage | 42°16’00″N, 143°21’00″E | 0.5 | 15-20 | Sand | 25,000 | 2 vessels | Health Inspection | 1. Medical waste handling protocols 2. No crew transfers during inspection |
1. Medical services available 2. Provisions delivery permitted |
Operational Parameters
- Pilotage: Compulsory for vessels >10,000 GT (24h notice via VHF Ch12/16)
- Tidal Data: Mean range 1.2m (max 1.8m springs) – Reference: JHA Tide Tables 2024
- Currents: Maximum 3.5 knots during spring tides (NE-SW orientation)
- Ice Conditions: Partial freezing Jan-Feb (icebreaker support available on request)
- Visibility Restrictions: Fog common April-June (radar monitoring mandatory)
Navigation Warnings
- Submarine cables: Prohibited zones marked on JHA Chart 12501 (2024 Edition)
- Fishing gear: Seasonal concentrations May-July in western approaches
- Military exercise areas: Occasional closures (NOTAMs issued via JMH Navtex)
Emergency Protocols
- Distress: JRCC Sapporo
- Medical: Tokachi Port Medical Center (VHF Ch12, 24/7 availability)
- Pollution: Mandatory immediate reporting (Japan Coast Guard Directive 2024-3)
