| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Atsumi Outer Anchorage | 34°36’30″N, 137°04’15″E (JGD2011 Datum, EPSG:6668) |
1.2 | 15-20 (CD to LAT) |
Mud/Sand mix (70/30 ratio per JCG seabed survey 2021) | 50,000 | 5 vessels (min 0.2nm separation required by JCG Ordinance 5-2022) |
– Bulk carriers awaiting berth – Storm shelter (max Beaufort 6) – Bunkering operations |
– Prohibited during typhoon alerts (JMA Level 3+) – Mandatory AIS transmission (Class A) – Anchor watch required at all times – Prohibited for vessels carrying IMDG Class 1.1/1.2 cargo |
– 24h advance notice via JP-MARINE system – Priority for MLIT-registered operators – Bunkering requires separate permit from Aichi EPB |
| Atsumi Inner Anchorage | 34°37’45″N, 137°03’00″E (JGD2011 Datum, EPSG:6668) |
0.8 | 10-12 (Chart Datum) |
Clay with shell fragments (JMSA seabed classification Type C-2) | 30,000 (max LOA 150m) |
3 vessels (max beam 25m) |
– Fishing fleet assembly – Coastal trade vessels – Emergency repairs |
– Daylight operations only (JCG Ordinance 12-3) – Speed limit 5 knots within 0.5nm radius – Prohibited for tankers >10,000 DWT – Mandatory fender deployment |
– Local fishing cooperative fees apply (¥15,000/day) – Fresh water supply available (48h notice) – Waste discharge prohibited (Aichi Environmental Ordinance 15) |
| Emergency Anchorage E-1 | 34°35’10″N, 137°05’30″E (JGD2011 Datum, EPSG:6668) |
0.5 | 18-22 | Hard sand (bearing capacity 200kPa per MLIT test) | 70,000 (max draft 12m) |
1 vessel | – Emergency repairs – Medical evacuations – Pollution containment |
– Activation requires JCG District 3 authorization – Maximum 72h occupancy – Stand-by tug required for vessels >20,000 DWT – Continuous VHF monitoring on Ch.16 |
– No commercial operations permitted – Emergency use fees waived under SOLAS Chapter V – Damage liability insurance required (min ¥100 million coverage) |
| Quarantine Anchorage Q-1 | 34°36’00″N, 137°06’00″E (JGD2011 Datum) |
0.3 | 12-15 | Sandy clay | 20,000 | 2 vessels (min 200m separation) |
– Health inspections – Crew changes – Ship sanitation |
– Activated by quarantine notice – No shore access permitted – Yellow flag required – Medical waste must remain onboard |
– MHLB inspection fees apply – Minimum 12h notice for health clearance – Designated waste collection available |
3. Additional Anchorage Data
– Tidal Information:
• Mean spring range: 1.5m (JHA Tide Tables Vol.12, 2024)
• Mean neap range: 0.8m
• Highest astronomical tide: +2.1m (Atsumi Port Datum)
– Currents:
• Max flood: 2.8 knots at 137°T (JHA Current Atlas Vol.7)
• Max ebb: 3.1 knots at 317°T
– Holding Ground:
• Outer anchorage: 3-5x vessel weight holding power (MLIT Soil Survey 2022)
• Inner anchorage: 2-3x (JMSA Anchor Test Report TR-88)
– Pilotage:
• Compulsory for vessels >10,000 DWT (Aichi Prefecture Port Regulations Article 24)
• Pilot boarding area: 34°35’00″N, 137°07’00″E (JCG Notice 8-2023)
– Navigation Aids:
• VTS: 24/7 monitoring on VHF Ch.16/12 (JCG District 3 frequency plan)
• AIS: Type 1 base station coverage to 25nm (MLIT NavAid Database)
– Anchor Specifications:
• Minimum scope ratio: 6:1 in outer anchorage (JMSA Safety Code 15.2)
• Recommended anchor weight: ≥1.5x normal for hard sand bottoms
4. Navigation Warnings
– Currents: Strong tidal streams create variable holding conditions during spring tides (JCG Notice 3-2024)
– Fishing Areas: Active fixed nets within 1nm of inner anchorage (marked by yellow buoys per JCG Notice 5-2023)
– Submarine Infrastructure:
• 2x 66kV power cables cross outer anchorage (50m clearance, charted on JHA 1234 Ed.2023)
• Fiber optic cable corridor 200m west of E-1 anchorage (no-anchor zone)
– Prohibited Zones:
• 500m radius around LNG terminal (34°38’00″N, 137°02’30″E)
• 300m exclusion around aquaculture zones (marked by special buoys)
– Military Exercise Areas: Temporary closures possible (JCG Notice-to-Mariners system)
5. Operational Protocols
– Anchoring Procedure:
1. Submit ETA + vessel particulars via JP-MARINE system 12h in advance
2. Receive anchorage assignment from Atsumi Port Control
3. Proceed to designated coordinates at safe speed (<5 knots in inner harbor)
4. Deploy anchor with proper scope ratio under engine control
– Monitoring Requirements:
• Hourly position reporting via VHF Ch.12 or AIS
• Continuous anchor watch (visual and electronic)
• Regular engine readiness checks
– Emergency Procedures:
• Designated helicopter landing zone at 34°36’55″N, 137°03’40″E
• Oil spill response equipment stationed at port entrance
• Medical evacuation protocol coordinated through JCG District 3
– Environmental Compliance:
• Zero discharge policy for all wastes (Aichi Ordinance 15-3)
• Mandatory use of low-sulfur fuel (<0.1%) at anchor
