Port Anchorages Conditions of Rumoi Port

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Anchorage Name Location (Coordinates WGS84) Area (km²) Depth (m) Bottom Type Max Vessel DWT Capacity Primary Use Restrictions & Safety Notes Commercial Notes Additional Information
Rumoi Main Anchorage A 43°57’00″N 141°38’30″E 0.8 15-18 (CD +0.2m) Mud/Sand (70/30 mix) 20,000 3 vessels (min 200m spacing) General cargo waiting SW winds create swell; prohibited Dec-Mar due to ice; anchor watch required; prohibited in NE winds >25kt 48-hour max stay without permission; port dues apply after 12 hours (¥15,000/day) Pilot boarding area 0.5nm NE; VHF Ch 16/12 monitored; recommended 6:1 scope in summer, 8:1 in winter
Rumoi Fishery Anchorage 43°56’15″N 141°37’45″E 0.3 8-10 (CD +0.2m) Sand/Shell (with clay substrate) 3,000 5 vessels (max 80m LOA each) Fishing vessels Daylight operations only; no night navigation permitted; mandatory fishing gear stowage Priority for licensed fishery vessels; 24-hour max stay for others; no transshipment allowed No bunkering permitted; fish transshipment area adjacent; tidal current up to 1.5kt during springs
Rumoi Emergency Anchorage 43°57’30″N 141°39’00″E 0.5 12-15 (CD +0.2m) Firm Clay (excellent holding) 15,000 2 vessels (min 400m spacing) Emergency use only Requires port master approval; max 72-hour stay; must report to JCG within 1 hour of anchoring No commercial operations permitted; exempt from port dues Equipped with emergency mooring buoy (SWL 50t); medical evacuation available within 2h notice
Rumoi Fuel Bunker Anchorage 43°56’45″N 141°39’15″E 0.4 16-20 (CD +0.2m) Sandy Mud (good holding) 30,000 2 vessels (min 300m spacing) Bunkering operations ATEX Zone 2; no smoking area; standby tug required; static electricity precautions Pre-booking required (min 24h); licensed bunker suppliers only; bunker guarantee required Bunker barge capacity 500t; max transfer rate 100t/hour; gas-free certificate required prior to operations
Rumoi Temporary Holding Area 43°57’15″N 141°37’30″E 0.6 10-12 (CD +0.2m) Mud (fair holding) 10,000 4 vessels (min 150m spacing) Bad weather shelter Max 5-day stay; not for cargo operations; must maintain engine readiness No port charges for first 24 hours (¥10,000/day thereafter) Poor holding in NE winds; recommend 6:1 scope; wave height monitoring available via VHF weather updates
Rumoi Quarantine Anchorage 43°56’50″N 141°40’00″E 0.2 12-14 (CD +0.2m) Clay/Sand 8,000 1 vessel Health inspections QM flag required; no shore leave permitted; medical waste disposal available Free pratique required before port entry; medical services available on request Equipped with dedicated quarantine launch; inspection available within 4h of request

Anchorage Technical Specifications

  • All depths referenced to Rumoi Port Datum (RPD) = Chart Datum +0.2m
  • Holding power index:
    • Excellent: Emergency Anchorage (holding coefficient 3.5)
    • Good: Main Anchorage A, Fuel Bunker Anchorage (coefficient 2.8)
    • Fair: Fishery Anchorage, Temporary Holding Area (coefficient 2.0)
  • Anchor drag monitoring required when winds exceed 25 knots (recommend GPS anchor watch)
  • Minimum underkeel clearance: 10% of draught or 2m, whichever is greater
  • Maximum allowable swing radius: 3 x vessel LOA or 500m, whichever is smaller

Operational Regulations

  • Complies with:
    • Japan Port Regulations Act (Article 37-2 for anchorage management)
    • ISPS Code requirements (MARSEC Level 1 normally)
    • IMO Resolution A.1045(27) for anchorage areas
  • Anchoring prohibited in designated cable areas (marked on charts JP124/JP125)
  • Mandatory:
    • AIS transmission while at anchor for vessels >300 GT
    • VHF watch on Ch 16 at all times
    • Daily position reports to Port Control at 0800JST
  • Anchorage inspections conducted quarterly by port authority (last inspection March 2024)

Safety Information

  • Tidal characteristics:
    • Range: 0.3m (neaps) to 0.8m (springs)
    • MHWS: 0.5m above CD
    • MLWS: 0.2m below CD
  • Currents:
    • Max flood: 1.2 knots at 285°T
    • Max ebb: 1.0 knots at 105°T
    • Slack water: ±1h from HW/LW
  • Ice conditions: Typically Dec-Mar, up to 0.4m thickness in severe winters (icebreaker available)
  • Emergency contacts:
    • Rumoi Port Control: VHF Ch 16/12 (24/7)
    • Japan Coast Guard: VHF Ch 16 (call sign “Rumoi JCG”)
    • Medical Emergency:

Commercial Services Available

  • Anchor handling:
    • Available upon request (min 12h notice)
    • Tug capacity: 2 x 30t bollard pull
  • Underwater inspection:
    • Certified divers available (ClassNK approved)
    • ROV inspection possible in >10m depth
  • Anchor chain measurement:
    • Electronic positioning service (accuracy ±5m)
    • Chain marking verification available
  • Emergency repair:
    • Limited ship repair services at anchorage
    • Emergency welding and patching available
  • Provisions:
    • Fresh water: 50t/day capacity
    • Provisions: Delivery by launch (min 6h notice)

Navigation Warnings

  • Caution required for:
    • Fishing nets within 0.5nm of fishery anchorage (marked by small buoys)
    • Submarine cable area 0.3nm NE of main anchorage (chart symbol T1)
    • Seasonal kelp farming areas May-Oct (marked by yellow buoys)
  • Special areas:
    • MARPOL Annex V Special Area (no garbage discharge)
    • Ballast water exchange prohibited within 12nm of coast

 

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