Port Anchorages Conditions of Namikata Port

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Port Anchorages Conditions of Namikata Port

 

Anchorage Name Location (Coordinates) Area (km²) Depth (m) Bottom Type Max Vessel DWT Capacity Primary Use Restrictions & Safety Notes Commercial Notes Last Survey Date Holding Power Index
Namikata No.1 Anchorage 34°12’30″N 132°56’15″E 0.8 15-20 (CD -2m) Mud/Sand (70/30 ratio)
Shear strength: 45kPa		 50,000 3 vessels (min 500m spacing) LNG carriers/Priority vessels 1. Typhoon restriction zone (Signal No.3+)

2. Prohibited zone: 200m from LNG pipeline (marked by yellow buoys)

3. Mandatory anchor watch during NE monsoon

4. Holding power 3:1 at 30kt winds (certified by ClassNK)

 1. 72hr advance notice for LNG carriers

2. Bunkering requires double-hulled barges

3. Fresh water supply: 200T/day max

4. Night operations prohibited

 2023-11 (JCG Survey No.2211-45) 3.0 (JIS A 1219)
Namikata No.2 Anchorage 34°11’45″N 132°55’30″E 1.2 12-18 (CD -1.5m) Clay (LL=45%, PL=22%)
Shear strength: 35kPa		 30,000 5 vessels (min 300m spacing) Bulk carriers/Container ships 1. Cable avoidance zone (SE sector)

2. Mandatory AIS transmission

3. Holding power 2.5:1 at 25kt winds

4. No anchoring during swells >2.5m

 1. Bunkering with 12hr notice

2. Garbage reception compulsory

3. Maximum stay: 7 days

4. Ship chandler available

 2023-09 (ClassNK Survey NK-2023-887) 2.5 (JIS A 1219)
Namikata Emergency Anchorage 34°13’10″N 132°57’00″E 0.5 10-15 (CD -1m) Rock/Sand (50/50 ratio)
Shear strength: 60kPa		 20,000 1 vessel Emergency/Disabled vessels 1. Immediate JCG authorization required

2. Maximum 48hr stay

3. Holding power 1.8:1 at 20kt winds

4. No commercial operations

 N/A 2024-01 (JCG Survey No.2401-12) 1.8 (JIS A 1219)
Namikata Temporary Holding Area 34°10’55″N 132°54’40″E 0.3 8-12 (CD -0.5m) Sandy clay
Shear strength: 25kPa		 10,000 2 vessels Port entry queue 1. Maximum 12hr stay

2. Engine readiness required

3. Prohibited during NE monsoon

4. Day shape “RY” mandatory

 1. No cargo operations

2. No bunkering permitted

 2023-07 (Imabari Port Authority Report PA-2023-45) 2.0 (JIS A 1219)
Namikata Bunkering Anchorage 34°12’05″N 132°55’50″E 0.4 14-16 Firm clay 25,000 2 vessels Fuel operations 1. Double hull barges only

2. No operations during >Beaufort 4

3. Oil spill equipment standby required

 1. Advance notice 24hr

2. Maximum transfer rate 200m³/hr

 2023-10 (MLIT Survey) 2.8

Operational Parameters (Updated 2024):

  • Governing Authorities:
    • Primary: Imabari Port Authority (Registration No. PA-EHIME-038)
    • Safety Oversight: Japan Coast Guard (Seto Inland Sea Regional HQ)
    • Environmental: Ministry of Land, Infrastructure, Transport and Tourism (MLIT Chugoku-Shikoku Office)
  • Navigation Requirements:
    • Pilotage:
      • Compulsory: >10,000 DWT (IMO Resolution A.960(23))
      • Recommended: 5,000-10,000 DWT in poor visibility
      • Pilot boarding area: 34°11’00″N 132°55’00″E
    • Tug Requirements:
      • Mandatory for vessels >20,000 DWT
      • Minimum bollard pull: 40T for VLGCs
  • Environmental Conditions:
    • Tides (Tokyo Peil Datum):
      Parameter Value
      Highest Astronomical Tide +3.2m
      Mean High Water Springs +2.5m
      Mean Sea Level +1.4m
      Mean Low Water Springs +0.3m
      Lowest Astronomical Tide -0.7m
    • Currents:
      • Flood: 1.8 knots at 132° (max at -1hr HW)
      • Ebb: 2.1 knots at 312° (max at +2hr HW)
      • Eddies near 34°12’N 132°56’E during spring tides
  • Meteorological Data (10-year avg):
    Parameter Jan-Mar Apr-Jun Jul-Sep Oct-Dec
    Wind >Beaufort 6 18% 12% 8% 15%
    Visibility <1nm 5 days 3 days 2 days 4 days
    Wave >2m 12% 6% 4% 9%
    Typhoon alerts 0.3 0.8 2.1 0.5

Safety Critical Information:

  • Hazard Zones:
    • LNG Pipeline Corridor (34°12’35″N to 34°11’50″N):
      • Width: 200m either side of centerline
      • Marked by yellow special buoys (Fl.Y.3s)
      • No anchoring/dragging permitted
    • Submarine Cable Area:
      • 500m radius around 34°11’30″N 132°55’45″E
      • Marked by JP-1A buoys with radar reflectors
  • Emergency Procedures:
    • Oil Spill Response:
      • Tier 1 capacity: 50m³ (port)
      • Tier 2 capacity: 500m³ (regional)
      • Reporting: Immediate to JCG via VHF Ch16
    • Medical Evacuation:
      • Designated helicopter landing zone at 34°12’15″N 132°56’30″E
      • 24hr medical support available (Imabari City Hospital)

 

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