| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Imabari No.1 Anchorage | 34°03’30″N, 133°00’15″E | 0.8 | 15-20 | Mud/Sand (70/30 mix) | 50,000 | 5 vessels (min 200m spacing) | General cargo, bulk carriers, shipyard operations | 1. Limited swing room (1.5x LOA required) 2. Typhoon evacuation required at JMA Alert Level 3 3. Mandatory tug assist >40,000 DWT 4. AIS transponder required |
1. Priority for Imabari Shipyard clients 2. Bunkering available (24h notice) 3. Customs boarding at anchorage permitted |
| Imabari No.2 Anchorage | 34°02’45″N, 133°01’00″E | 1.2 | 12-18 | Clay/Mud (with shell fragments) | 30,000 | 8 vessels (min 150m spacing) | Coastal vessels, tankers (non-hazardous) | 1. Currents reach 2.8 knots during spring tides 2. Prohibited for LNG/LPG carriers 3. Daily depth checks required 4. Night navigation restrictions |
1. Bunkering via barge (10h advance notice) 2. Freshwater supply available 3. Waste disposal services |
| Hakata Island Anchorage | 34°04’10″N, 132°59’40″E | 0.5 | 10-15 | Sand/Shell (hard bottom) | 20,000 | 3 vessels | Fishing vessels, small freighters | 1. No anchoring 2000-0600 JST 2. Prohibited for hazardous materials 3. Fishing gear clearance zone 4. Poor holding in NW winds >15kt |
1. Direct access to fish market 2. Provisions available 3. Limited repair services |
| Omishima Emergency Anchorage | 34°05’20″N, 133°00’50″E | 0.3 | 8-12 | Rock/Mud (variable) | 10,000 | 2 vessels | Emergency use only | 1. Port Control permission required 2. Max 72hr stay 3. Medical/mechanical emergencies only 4. No cargo operations |
1. No commercial services 2. Tug assistance on standby |
| Seto Inland Sea Holding Area | 34°06’00″N, 133°02’30″E | 2.0 | 20-25 | Mud | 100,000 | 10 vessels | VLCCs, deep-draft vessels | 1. Minimum 500m spacing 2. Requires 2 tugs >80,000 DWT 3. No discharge operations 4. Mandatory DP watch |
1. Bunkering prohibited 2. Crew changes permitted |
Operational Regulations:
- Pilotage:
- Compulsory for vessels >10,000 GT (Japan Maritime Law Article 56)
- Boarding position: 34°03’00″N, 133°01’00″E (marked by light buoy #12)
- Pilot transfer requires Beaufort ≤4, daylight preferred
- Tidal Information:
- Mean tidal range: 2.5m (max 3.1m during equinoctial springs)
- Current tables published quarterly by JCG Hydrographic Dept
- Meteorological Restrictions:
- Typhoon evacuation protocol: 6hr notice for JMA Level 3
- Winter NW monsoon advisory (Nov-Mar): wind limits 25kt sustained
- Legal Framework:
- Primary: Ports and Harbors Law (No. 218/1950, amended 2021)
- Supplementary: Marine Pollution Prevention Law (No. 136/2004)
- Local: Ehime Prefecture Port Ordinance §12-3 (anchorage fees)
Emergency Protocols:
- Contacts:
- Imabari Coast Guard: VHF Ch.16/67, +81-898-32-0110 (verified 2024)
- Port Authority Operations: VHF Ch.12, +81-898-33-1122 (24/7)
- Distress Signals: Red flares or DSC alert on VHF Ch.70
- Oil Spill Response: Must report immediately to JCG (+81-898-32-0119)
Commercial Services:
- Fees (2024):
- Standard anchorage: JPY 15,000/day (>5,000 DWT)
- Emergency use: No charge (max 72hr)
- Bunkering permit: JPY 50,000 (single operation)
- Service Providers:
- Bunkering: Shikoku Bunker Co. (VHF Ch.71)
- Provisions: Marusen Supply (VHF Ch.73)
Technical Validation:
- Chart Standards:
- JCG Chart 1114 (Ed. 12/2023, WGS84 datum)
- IHO S-57 ENC standards compliance
- Depth Verification:
- LAT + 0.5m safety margin (per MLIT Notice 412/2022)
- Multibeam survey conducted 2022 (JCG Report MH-45)
- Load Limits:
- DWT calculations include 10% safety factor
- Holding power tested for 5:1 scope (sand/mud bottoms)
