| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Miyazu Outer Anchorage | 35°32’30″N 135°11’45″E | 0.8 | 15-20 | Mud/Sand (shell fragments) | 10,000 | 3 vessels (min 200m spacing) | Waiting/Storm shelter | Exposed to NW winds (Nov-Mar). Limited holding ground in NE sector. Minimum 0.3nm clearance from fishing zones. Prohibited for vessels carrying Class 1 dangerous goods. | Pilotage required for vessels >500 GT. No night operations permitted. Anchoring fee: ¥15,000/day (vessels >3,000GT). |
| Miyazu Inner Anchorage | 35°32’15″N 135°12’30″E | 0.5 | 10-12 (CD) | Clay (stiff consistency) | 5,000 | 2 vessels (max LOA 150m) | Cargo operations (general cargo only) | Tidal currents up to 2 knots (flood tide). Prohibited for LPG carriers. Mandatory port entry notification 24h in advance. Daylight operations only (sunrise-sunset). | Bunkering available with prior notice (48h). Freshwater supply rate: 50t/hour (max 200t/day). Waste reception available Mon/Wed/Fri. |
| Emergency Anchorage A | 35°33’00″N 135°10’30″E | 0.3 | 18-22 | Rock/Sand (patchy) | 15,000 | 1 vessel | Emergency use only | Requires special permission from Miyazu Port Authority (contact via JCG Ch.16). No commercial operations allowed. Maximum stay 72 hours. Must maintain emergency towline readiness. | No services available. Vessels must maintain engine readiness. Medical evacuation possible via JCG helicopter (coordinate through port office). |
| Temporary Anchorage B | 35°31’45″N 135°13’15″E | 0.4 | 8-10 | Sandy clay | 3,000 | 2 vessels | Coastal vessels/small craft | Daylight use only. Prohibited during typhoon warnings (Signal No.3+). No bunkering permitted. Minimum underkeel clearance 1.5m required. | Limited provisions delivery available (24h notice). No waste reception facilities. |
Additional Operational Information:
- Anchorage holding power:
- Outer: Moderate (recommend 6:1 scope in normal conditions, 7:1 in typhoon season)
- Inner: Good (5:1 scope sufficient except during spring tides)
- Emergency A: Poor (recommend 8:1 scope due to rocky patches)
- Temporary B: Fair (variable holding, recommend testing with 60m initial scope)
- Tidal characteristics:
- Mean tidal range: 1.2m (spring), 0.8m (neap)
- Max observed range: 1.8m during equinoctial springs
- Tide tables: Refer to JCG Tidal Predictions for Miyazu (Station No. 6321)
- Meteorological conditions:
- Prevailing winds: NW in winter (max 25kt), SE in summer (max 20kt)
- Gale frequency: 8% in Jan-Feb (NW monsoons)
- Fog occurrence: 12% annual average (peaking May-Jun)
- Navigation services:
- Pilot boarding area: 35°32’40″N 135°11’20″E (daylight hours only, sea state permitting)
- VTS coverage: Partial (monitored by Kyoto District Coast Guard, channel 16/12)
- Radar coverage: 12nm range from Miyazu Head (35°33’12″N 135°10’48″E)
- Emergency services:
- Nearest hospital: Miyazu City Hospital (35°32’05″N 135°11’55″E) with decompression chamber
- Oil spill response: Tier 1 capability available (max 50t capacity)
- Search and rescue: JCG Maizuru Station (response time 60-90min)
- Physical hazards:
- Anchor dragging risk: High during typhoon season (July-Oct)
- Underwater cables: Present between outer and inner anchorages (marked on charts)
- Magnetic anomalies: Reported near 35°32’20″N 135°11’00″E (affect compasses within 200m)
Safety Procedures:
- Mandatory protocols:
- Anchor watch required at all times (continuous deck watch during poor visibility)
- Depth soundings verification against JCG Chart 1234 (2023 edition)
- AIS transmission mandatory within port limits (per JCG Notice 12-2021 Article 4)
- Typhoon preparedness plan required July-October
- Navigation warnings:
- Frequent fog April-June (visibility <500m on 30% of days)
- Strong currents during spring tides (max 3kt at narrows)
- Fishing nets present outside marked channels (reported to 2nm offshore)
- Military exercise area occasionally active within 5nm radius (NOTAMs issued)
- Emergency contacts:
- Port Authority: Via JCG Ch.16 (no direct VHF channel)
- Medical emergency: JCG Dispatch 118
- Pollution incident: Kyoto Prefecture Marine Pollution Control Center
Commercial Services Details:
- Anchorage services:
- Fresh water supply: Inner anchorage only (advance booking required, max 200t/day)
- Garbage disposal: Port authority boats (Mon/Wed/Fri 0900-1100, ¥5,000/ton)
- Provisions delivery: Licensed contractors (list available from port office)
- Bunkering:
- Inner anchorage only (48h notice required)
- Available grades: MGO, IFO 180
- Barge capacity: Max 500t per transfer
- Waste management:
- Slop reception: For tankers at inner anchorage (72h notice)
- No reception for hazardous waste (must proceed to Maizuru)
- Fees (2023 rates):
- Anchorage fee: ¥15,000/day (>3,000GT), ¥10,000/day (<3,000GT)
- Pilotage: ¥85,000 per movement (daylight only)
- Fresh water: ¥300/ton
Important Notes:
- All coordinates use WGS84 datum (consistent with Japanese charts)
- Depth references are to Chart Datum (CD) which is 0.3m below LAT
- Daylight operations defined as 30min before sunrise to 30min after sunset
- Port authority approval required for any anchoring exceeding 7 days
- Vessels >10,000 DWT must submit anchoring plan 72h in advance
