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Port Anchorages Conditions of Yawatahama Port

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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)
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