| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Janghang Outer Anchorage | 36°00’30″N, 126°40’15″E | 2.5 | 15-20 | Mud/Sand (70/30 mix) | 50,000 | 5 vessels (min 500m spacing) | Waiting/Staging/Pilot transfer | Exposed to NW winds (gusts to 35kt); strong currents (2.5kt max); prohibited for vessels carrying Class 1 explosives; mandatory anchor watch | Pilot boarding area (24h notice); bunkering available (48h notice); provisions delivery (6h notice) |
| Janghang Inner Anchorage | 36°01’45″N, 126°42’00″E | 1.2 | 10-12 | Clay (bearing capacity 150kPa) | 20,000 | 3 vessels (min 300m spacing) | Bunkering/Shelter/Repairs | Limited swing room (1.5:1 scope required); prohibited for LPG carriers; anchoring prohibited within 200m of submarine cable (marked); no dragging permitted | Fresh water available (100t/day limit); ship chandler services; limited repair capabilities |
| Janghang Emergency Anchorage | 36°02’10″N, 126°38’45″E | 0.8 | 18-22 | Sand/Shell (90/10 mix) | 30,000 | 2 vessels | Emergency use only | Requires port control permission (VHF Ch 16/12); maximum stay 48h; medical emergencies prioritized | No commercial services; tugs available on 2h notice |
| Janghang Quarantine Anchorage | 36°00’50″N, 126°39’30″E | 0.5 | 12-15 | Mud | 15,000 | 1 vessel | Health inspections | Yellow flag required; no crew transfers; QPS procedures apply | Medical waste disposal available |
Additional Information:
- Anchorage holding ground: Outer (good holding), Inner (excellent), Emergency (fair), Quarantine (good) – KHOA Seabed Survey 2022
- Tidal data: Mean 3.2m (MHWS 4.1m, MLWS 2.3m), max 5.1m during spring tides (KHOA Tide Tables 2023)
- Pilotage: Compulsory >500 GT (Janghang Port Regulation Article 14); boarding position 36°00’45″N 126°40’30″E
- VHF Channels: Ch 16 (emergency), Ch 12 (port operations), Ch 09 (pilot), Ch 14 (tugs)
- Medical: Seocheon Medical Center (30min) with decompression chamber; port clinic (basic first aid)
- Port authority: Janghang Port Management Office (verified via Korea Ministry of Oceans and Fisheries)
- Regulations: Mandatory AIS within 12nm; ECDIS updates weekly; S-57 ENC KR521110
- Anchorage inspection: Quarterly by Korea Coast Guard (last 2023-11-20); monthly depth checks
- Currents: Flood tide sets NW at 1.5kt; ebb tide SE at 2.0kt (KHOA Current Atlas)
Navigation Warnings:
- Fishing activity: Nets October-March (marked by orange buoys); trawlers active at night
- Submarine infrastructure: Pipeline 1.5nm NE (36°01’00″N 126°41’00″E); power cable 0.8nm SW
- Military areas: Exercise zone W122 (activated via NOTAM; avg 6 days/month)
- Wrecks: Uncharted at 36°01’12″N 126°41’30″E (8m depth); charted wreck at 36°00’20″N 126°39’40″E (15m)
- Tidal streams: 3kt in approach channel; eddies near inner anchorage
- New hazard: Construction barge operating within 1nm of outer anchorage (2023-12 to 2024-03)
Meteorological Data:
- Typhoons: June-September (1.2/year avg); evacuation procedures in Port Contingency Plan
- Winds: NW monsoon (Dec-Feb) 25-30kt; summer SW winds 15-20kt (KMA 10-yr stats)
- Visibility: <1km 15 days/year; fog April-May (23% mornings); haze October
- Waves: Winter >2m 18%; summer swell <1.5m
- Temperature: Winter min -8°C; summer max 34°C (heat stress warnings July-August)
Operational Procedures:
- Anchoring: Permission via VHF Ch 12 (1h notice); position report every 6h
- Monitoring: Daily status reports 0800/2000; weather warnings broadcast hourly
- Tugs: >10,000 DWT require standby; availability 90% (2x 3200HP tugs)
- Environment: Zero discharge policy; oil spill equipment at ready
- Security: ISPS Level 1; 24h watch; restricted areas marked
- Emergencies: SAR coordination via Jeonnam Coast Guard (response time 45min)
