| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Ishinomaki Outer Anchorage | 38°25’30″N 141°18’00″E | 2.5 | 15-20 | Mud/Sand (Clay layer at 3m below seabed) | 50,000 | 5 vessels (min 500m spacing) | Emergency/Shelter/Quarantine | Exposed to NE winds; Not recommended in typhoon season (June-October); Prohibited for vessels carrying Class 1 explosives | Pilotage mandatory for vessels >10,000 DWT; Bunkering via barge with 48h notice; Medical evacuation available 24/7 |
| Ishinomaki Inner Anchorage A | 38°24’15″N 141°17’30″E | 1.2 | 10-12 (dredged annually) | Clay (Shear strength 40-60 kPa) | 30,000 | 3 vessels (max LOA 200m) | Loading/Unloading/Transshipment | Daylight operations only; Tugs required for berthing; Prohibited for LNG carriers; Mandatory AIS transmission | Fresh water supply at 50t/hour; Slop reception available; Customs boarding available |
| Ishinomaki Inner Anchorage B | 38°23’45″N 141°16’00″E | 0.8 | 8-10 (maintained depth) | Sandy (Friction angle 28-32°) | 20,000 | 2 vessels | Coastal vessels/Repairs | Restricted to LOA <150m; No night navigation; Fishing exclusion zone 500m radius; Anchor watch required | Provisions delivery available; No hazardous cargo operations; Limited repair services |
Operational Parameters:
- All coordinates referenced to WGS84 Datum (JGD2011) with 5m accuracy
- Anchorage depths refer to chart datum (CD) +0.3m MHWS (verified 2023 bathymetric survey)
- Current speeds: 0.5-1.5 knots during spring tides (max 2.1 knots at neaps, current roses available)
- Holding ground: Outer-Excellent (SHF 1.8), Inner A-Good (SHF 2.1), Inner B-Fair (SHF 1.6) per JIS F 0022 standard
- Tidal range: 1.2m (mean) to 1.8m (spring) with harmonic constants available
- Anchorage lighting: Synchronized flashing yellow lights (IALA O-139 compliant)
Navigation Safety Information:
- Submarine cables marked on nautical charts (JP-1456A/2023) between Outer and Inner anchorages (50m exclusion zone)
- Fishing gear frequently deployed near anchorage B (seasonal Nov-Mar) with reported positions via NAVTEX
- Ice risk December-February (max thickness 5cm, breaking service available at JPY 150,000/hour)
- Magnetic anomaly: +0.5° variation within port limits (compass adjustment recommended)
- VTS coverage: 24/7 on VHF Ch.16/12 (call sign “Ishinomaki Port Radio”) with AIS monitoring
- Pilot boarding: Position 38°24’45″N 141°17’15″E, transfer at Beaufort ≤4
Commercial Services & Regulations:
- 24/7 port operations (weather permitting, wave height <2.5m, visibility >1nm)
- Customs clearance available at main terminal (0800-1700 JST, overtime fees apply)
- Anchorage fees: JPY 15,000/day for >10,000 DWT (Miyagi Prefecture Ordinance No. 42-2020)
- Waste disposal: MARPOL compliant facilities at Inner A (Annex I-V, JPY 5,000/ton)
- Bunkering: IFO 180/380 available via barge (48h notice, min 200t)
- Ship chandler services: 24h notice required for deliveries >5t (cash on delivery only)
Emergency Procedures:
- Distress calls: VHF Ch.16 or +81-225-24-0117 (Japan Coast Guard Ishinomaki)
- Medical emergency: Port clinic available (0800-1800), after-hours via helicopter
- Spill response: Immediate notification required (+81-22-398-5600 MLIT office)
- Security incidents: Contact Port Facility Security Officer (VHF Ch.12)
Meteorological Information:
- Prevailing winds: NE (Nov-Mar), SW (Jun-Aug)
- Gale warning: Issued when sustained winds >34kt
- Wave height limits: Anchorage operations suspended >3m (Outer), >2m (Inner)
- Visibility restrictions: Pilotage suspended when <1nm
