| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Iho Outer Anchorage | 34°23’30″N 132°26’15″E (JGD2011 Datum) WGS84 equivalent: 34.391667N 132.437500E |
1.2 (0.5nm radius) |
15-20 (Chart Datum) Dredged to 22m in 2023 |
Mud/Sand mix (70% mud, 30% sand per 2023 seabed survey) Holding power: Good (Shank penetration 1.2-1.8m) |
50,000 (LOA 230m max) |
3 vessels (min 0.3nm separation) Total GT limit: 120,000 |
1. Waiting area 2. Storm shelter (Category B) 3. Bunkering |
1. NE exposure (winter gusts to 35kt) 2. Prohibited during typhoon Signal #3+ 3. Submarine cable 0.5nm NE (JP1221 Chart) 4. Anchor watch mandatory (VHF Ch16) 5. No discharge of ballast water |
1. Bunkering: 24hr notice (max 500t/hr) 2. Slop reception: JIS K 2247 standard 3. No fresh water 4. Bunker quality: ISO 8217:2017 |
| Iho Inner Anchorage | 34°24’10″N 132°25’45″E (JGD2011 Datum) WGS84 equivalent: 34.402778N 132.429167E |
0.8 (0.4nm radius) |
10-12 (MLWS) Dredged quarterly |
Clay (Bearing capacity 50kPa) Holding power: Excellent |
30,000 (LOA 180m max) |
2 vessels (min 200m separation) |
1. Cargo operations 2. Crew changes 3. Provisions |
1. Currents: 2kt flood/1.8kt ebb 2. Mooring boats compulsory >5,000GT 3. Red zone prohibition (JP1221/5A) 4. Daylight operations only 5. Anchor dragging alarm required |
1. Provisions: 48hr notice (min €1,500 order) 2. Garbage: Tue/Fri collection (MARPOL categories) 3. Customs: 2hr clearance at anchor 4. No cash transactions onboard |
| Emergency Anchorage A | 34°22’45″N 132°27’00″E (JGD2011 Datum) |
0.5 (0.25nm radius) |
18-22 (Maintained depth) |
Hard Sand (Bearing capacity 80kPa) |
20,000 (LOA 150m max) |
1 vessel (No time limit) |
1. Emergency repairs 2. Medical evacuations |
1. No commercial ops 2. JMTC permission required 3. Continuous VHF watch 4. Emergency lighting required |
1. No services available 2. Emergency towage on call 3. Helicopter pad coordinates provided on request |
| Quarantine Anchorage | 34°23’50″N 132°26’30″E | 0.3 | 12-14 | Sandy Clay | 15,000 | 1 vessel | Health inspections | 1. ISPS Security Level 2 always 2. No crew transfers 3. Yellow flag required |
1. Medical waste disposal 2. Telemedicine available |
1. Navigational Warnings :
– Currents: 3kt max at 34°24’05″N 132°25’50″E (spring tides)
– Hazards:
• Fishing nets (March-September within 2nm)
• Unlit aquaculture buoys (1.2nm NW)
• Radar shadow near Inoshima Island (34°22’N 132°28’E)
• New wind farm construction 3nm NE (2024-2025)
– AIS blackspot reported at 34°23’15″N 132°26’45″E
2. Port Regulations :
– AIS: Mandatory within 12nm (including MMSI transmission)
– Anchoring:
• Prohibited in cable areas (JP1221 Annex 4)
• Minimum scope 5:1 in outer anchorage
– Documentation:
• Stability calcs required >10,000GT (6hr pre-arrival)
• Waste manifests for all vessels
– Operations:
• Night navigation: Pilot required
• Bunkering: Double hull barges only
3. Emergency Contacts :
– Port Control: VHF Ch 16/12 (24/7)
– Japan Coast Guard Hiroshima: +81-82-243-0110
– JMTC: VHF Ch 67 (emergencies)
– Medical: Telemedicine VHF Ch 08
– Pollution Response: +81-82-243-0220
4. Tidal Information :
– Tides:
• Mean range: 2.1m
• MHWS: +3.2m
• Chart Datum: -0.4m
– Currents:
• Flood: 5hr duration (max 2.5kt)
• Ebb: 7hr duration (max 2.2kt)
• Slack water: 20-30 mins
5. Weather Patterns:
– Visibility:
• Fog: 23% Nov-Mar (<500m)
• Rain: 180 days/year
– Winds:
• Winter NW monsoon: Beaufort 5 avg
• Typhoons: 1.7/year within 100nm
– Wave Height:
• Outer anchorage: 1.5m winter avg
• Inner anchorage: 0.8m max
6. Pilotage Services:
– Requirements:
• Compulsory >10,000DWT or >150m LOA
• Ladder: SOLAS + 1.5m clearance
– Operations:
• Boarding ground: 34°23’00″N 132°27’30″E
• Notice: 6hr standard, 1hr emergency
• Night transfers: Illumination required
7. Anchorage Services:
– Underwater Services:
• Hull cleaning (approved contractors)
• Dive inspections (48hr notice)
– Provisions:
• Minimum order €1,500
• Halal/kosher available (72hr)
– Medical:
• Helipad: 34°24’00″N 132°25’30″E
• Telemedicine: English/Japanese
8. New Additions :
– Seabed Changes:
• Outer anchorage: 0.3m silt accumulation
• Inner anchorage: New scour pits detected
– Equipment:
• New AIS base station installed
• Differential GPS available
– Regulations:
• New ballast water sampling
• Updated waste categories
