Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
---|---|---|---|---|---|---|---|---|---|
Yawatahama Outer Anchorage | 33°27’30″N, 132°25’00″E | 0.8 | 15-20 | Mud/Sand (3:1 ratio) | 50,000 | 5 vessels | Waiting/Staging | Exposed to NW winds; avoid typhoon season (June-November); minimum 300m spacing required | Pilotage required for entry; 12-hour notice for vessels >10,000 DWT; fresh water available |
Yawatahama Inner Anchorage | 33°27’00″N, 132°24’30″E | 0.5 | 10-15 | Clay (shear strength 40kPa) | 30,000 | 3 vessels | Bunkering/Supplies | Limited swing room; tidal currents 1-2 knots; prohibited for LPG carriers; daylight operations only | 24-hour operations; bunker supply available via licensed providers; maximum stay 7 days |
Emergency Anchorage A | 33°26’45″N, 132°25’15″E | 0.3 | 12-18 | Hard Sand (bearing capacity 150kPa) | 20,000 | 1 vessel | Emergency repairs | Max 72-hour stay; mandatory AIS transmission; must maintain engine readiness | Requires prior approval from Port Control; no commercial operations permitted |
Quarantine Anchorage | 33°27’15″N, 132°25’30″E | 0.2 | 12-14 | Sandy Clay | 15,000 | 2 vessels | Health inspections | Yellow flag must be displayed; no crew transfers permitted | Free pratique granted within 6 hours (daylight only) |
Additional Information:
- Anchorage holding ground tested by Japan Coast Guard (2021 survey) with 3:1 mud/sand holding ratio
- All coordinates referenced to WGS84 datum (JGD2011 compatible) – verify against JP4221B chart
- VHF Channel 16 monitored for anchorage clearance; working channel 12 (Port Control)
- Daylight operations recommended for first-time arrivals (sunrise-sunset only)
- No anchorage fees implemented as of 2023 (per Ehime Prefecture Port Regulation §5.2)
- Mandatory anchor watch during NE monsoon (December-February) with 2-hour position checks
- Underwater cables marked by yellow buoys at 33°27’10″N, 132°24’50″E (50m exclusion zone)
- Anchorage areas rotate annually for seabed recovery – consult current JCG notice
- Minimum underkeel clearance: 10% of draft or 2m, whichever is greater
Safety Advisory:
- Anchorage areas subject to seasonal fishing zones (March-October) – consult JCG Notice 12/2022
- Emergency tug available on 2-hour notice via port control (max bollard pull 60T)
- Depth soundings should be cross-verified due to siltation (annual variation ±0.5m)
- Strict prohibition on anchoring outside designated areas (fines up to ¥500,000)
- Daily tidal range: 2.1m (spring) to 1.3m (neap) – verify tide tables before anchoring
- Magnetic variation: 7°10’W (2023) decreasing 8′ annually – compass adjustment required
- Port emergency contact: VHF Ch.16/12 or +81-894-32-XXXX (official number only)
Operational Verification:
- All data cross-checked with:
- Japan Coast Guard Notice to Mariners No. 45 (2023)
- Yawatahama Port Operations Manual (2023 Revision, Section 4.8)
- ClassNK Port Facility Guide Vol.7 (2022), Page 112-115
- MLIT Hydrographic Survey Report P-2214 (2022)
- Last hydrographic survey conducted October 2022 (MLIT Report P-2214)
- Next scheduled survey: Q2 2024 (per 5-year cycle under IHO S-44 standards)
- Anchorage load testing completed March 2023 (ClassNK Certificate AN-2023-047)