| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes | Holding Ground | Tidal Current | Pilotage Requirement | Turning Basin | Emergency Services |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outer Anchorage A | 34°57.5’N, 136°47.0’E (WGS84 Datum) |
3.2 | 20-25 (CD) |
Clay/Sand (Shear strength 50kPa) |
200,000 | 6 vessels (Min spacing 500m) |
VLCCs, Bulk Carriers Bunkering |
1.5nm clearance required No LNG carriers Typhoon alert level 3: evacuate Mandatory AIS transmission |
Bunkering available 72h max stay Fees: ¥150,000/day Bunker suppliers: 3 licensed |
Good (3:1 scope) Tested 50t holding power Anchor drag alarm required |
0.5-1.2 knots Flood: 045° Ebb: 225° Slack: ±1hr HW/LW |
Mandatory >10,000 GT Pilot boarding area: 34°56.0’N, 136°48.5’E 4hr notice required |
Diameter 800m Depth 22m 2 tugs standby |
24/7 patrol boat Oil spill response team Medical evacuation |
| Inner Anchorage B | 35°00.2’N, 136°50.1’E (WGS84 Datum) |
2.1 | 15-18 (CD) |
Sandy Clay (Shear strength 40kPa) |
100,000 | 8 vessels (Min spacing 400m) |
General Cargo, Containers Provisions |
Daylight ops only (SR-SS) No anchoring in SW monsoon Max wind 25kt No hot work |
Fresh water supply 48h max stay Fees: ¥100,000/day Garbage disposal available |
Fair (4:1 scope) Tested 30t holding power 2 anchors recommended |
0.3-0.8 knots Flood: 040° Ebb: 220° Slack: ±45min HW/LW |
Mandatory >20,000 GT Pilot boarding area: 35°01.0’N, 136°51.0’E 6hr notice required |
Diameter 600m Depth 18m 1 tug standby |
Port doctor available Fireboat on call |
| West Anchorage C | 35°02.1’N, 136°45.3’E (WGS84 Datum) |
1.8 | 12-15 (CD) |
Mud/Sand (Shear strength 30kPa) |
50,000 | 10 vessels (Min spacing 300m) |
Coastal Vessels, Barges Lighterage |
Speed limit 5kt No oil transfer Max LOA 200m No night ops |
Ship chandler available 24h max stay Fees: ¥60,000/day No bunkering |
Good (3:1 scope) Tested 20t holding power Mudmap available |
0.2-0.5 knots Variable direction Weak eddies |
Recommended Pilot on request 12hr notice |
Diameter 400m Depth 15m No tugs |
Coast guard patrol |
| Emergency Anchorage D | 34°58.7’N, 136°49.5’E (WGS84 Datum) |
0.9 | 18-20 (CD) |
Hard Clay (Shear strength 60kPa) |
150,000 | 2 vessels (Min spacing 800m) |
Emergency Use Only Disabled vessels |
Port Control permission Max 12h stay No commercial ops Priority for distress |
No services No charges No provisions |
Poor (5:1 scope) Tested 40t holding power Chain only |
0.4-1.0 knots Flood: 050° Ebb: 230° |
Mandatory Pilot immediate VHF Ch 16 |
Diameter 500m Depth 20m 3 tugs standby |
Full emergency response Pollution control |
| Quarantine Anchorage E | 35°01.5’N, 136°48.2’E (WGS84 Datum) |
1.2 | 10-12 (CD) |
Sandy Mud (Shear strength 25kPa) |
30,000 | 4 vessels (Min spacing 500m) |
Health Inspection Pratique |
No crew transfer Radio silence Medical waste protocol |
Free pratique 6h max stay No fees No services |
Fair (4:1 scope) Tested 15t holding power |
0.3-0.6 knots Variable direction |
Mandatory Pilot standby Q flag required |
Diameter 300m Depth 12m |
Health inspection team Ambulance standby |
| Container Anchorage F | 34°59.3’N, 136°46.8’E (WGS84 Datum) |
2.5 | 16-18 (CD) |
Firm Sand (Shear strength 45kPa) |
80,000 | 5 vessels (Min spacing 350m) |
Container Feeder Ships Inspections |
No bulk carriers No bunkering Hatch covers secured |
Container inspection 36h max stay Fees: ¥120,000/day Reefer monitoring |
Excellent (3:1 scope) Tested 35t holding power |
0.4-0.9 knots Flood: 042° Ebb: 222° |
Mandatory >15,000 GT Pilot boarding area: 34°58.5’N, 136°47.5’E |
Diameter 700m Depth 17m 1 tug standby |
Customs available Cargo surveyors |
| LNG Temporary Anchorage G | 34°56.8’N, 136°48.2’E (WGS84 Datum) |
1.5 | 22-25 (CD) |
Hard Sand (Shear strength 55kPa) |
180,000 | 2 vessels (Min spacing 1nm) |
LNG Carriers Emergency holding |
Exclusion zone 1nm No other vessels IGS operational No hot work |
Max 8h stay Fees: ¥200,000 No services |
Good (4:1 scope) Tested 60t holding power |
0.6-1.3 knots Flood: 048° Ebb: 228° |
Mandatory Specialist LNG pilot 24hr notice |
Diameter 900m Depth 24m 4 tugs standby |
Emergency shutdown Hazmat team |
Additional Anchorage Information
| Category | Detailed Specifications |
|---|---|
| Holding Power Certification | Annual seabed surveys conducted by JHA Certified to JIS A 5304 (2023 Edition) 50-year storm condition rating |
| Drag Circle Monitoring | Minimum 3x depth + vessel length Real-time GPS tracking mandatory >50,000 DWT Alarm threshold: 0.1nm movement |
| Prohibited Areas | 500m from submarine cables (Chart JMH 112A/B) 1nm LNG terminal exclusion zone Military exercise areas (JCG Notice 05/2024) |
| Under Keel Clearance | 2m at LAT (3m recommended >150,000 DWT) Tidal prediction tables issued monthly |
| Anchor Watch Protocol | Hourly position reports to Port Control Continuous engine readiness >100,000 DWT VHF Ch 12/16 monitoring |
| Emergency Equipment | All anchorages have: – Emergency mooring buoys (SWL 100t) – Oil spill containment (500m boom capacity) – NAVTEX warnings (490kHz) |
| Meteorological Limits | Anchoring prohibited when: – Winds >35kt sustained – Visibility <1nm – Wave height >3m |
Operational Conditions
- Tidal Data:
– Mean range: 2.8m
– Spring range: 3.8m
– Neap range: 2.0m
– Real-time monitoring: Port Authority Website - Wind Conditions:
– NE monsoon (Oct-Apr): 15-25kt
– SW monsoon (May-Sep): 10-20kt
– Typhoon season: July-October - Visibility Requirements:
– Anchoring prohibited <1nm visibility
– Radar monitoring mandatory in fog - Emergency Contacts:
– Port Control: VHF Ch 16/12
– MMSI: 004310001
– JRCC Tokyo: +81 3 3591 6365 - Service Turnaround:
– Bunkering: 6-12 hours
– Provisions: 4-8 hours
– Crew changes: Prior arrangement - Navigation Aids:
– Synchronized flashing yellow lights (Q.Y)
– Radar reflectors (Racon T)
– AIS stations (MMSI 004311234-9)
Navigation Warnings
- Magnetic Variation: 7°10’W (2024)
Annual decrease 0°08′ - Underwater Hazards:
– Uncharted wrecks (34°58.2’N, 136°46.5’E)
– Pipeline areas (Chart JMH 112B) - Fishing Zones:
– Seasonal restrictions (Apr-Jun)
– Floating gear marked by buoys - Military Areas:
– Live fire exercises (JCG Notice)
– Restricted zones (Chart W123) - Environmental:
– Marine protected areas
– Turtle nesting zones (May-Aug)
