| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Paira Outer Anchorage | 21°45’00″N 89°30’00″E (WGS84 Datum) |
5.2 ±0.3 | 12-18 (CD) +2m HW springs |
Mud/Sand (70/30%) Holding power: Moderate |
50,000 DWT (LOA: 230m max) |
10 vessels (0.5nm separation) |
– Waiting area – Bunkering – Ship-to-ship transfers |
– Monsoon winds NE 25-35kt (Dec-Mar) – Currents: 2.5kt flood, 3.0kt ebb – Prohibited: LNG carriers >20,000m³ |
– Bunkering requires 24h notice – STS ops need BPA Form-7 – Avg stay: 3.2 days (2023 data) |
| Paira Inner Anchorage | 21°50’15″N 89°35’20″E (WGS84 Datum) |
3.8 ±0.2 | 8-12 (CD) +1.5m HW springs |
Soft Clay Holding power: Poor |
30,000 DWT (LOA: 180m max) |
6 vessels (0.3nm separation) |
– Lighterage – Provisions – Crew changes |
– Max stay 72hr – No night ops (18:00-06:00 LT) – Mandatory fenders for barges |
– Lighterage rate: $8.50/ton (2024) – Fresh water available – No bunkering allowed |
| Paira Emergency Anchorage | 21°48’30″N 89°33’45″E (WGS84 Datum) |
2.5 ±0.1 | 15-20 (CD) +2.5m HW springs |
Compact Sand/Shell Holding power: Good |
80,000 DWT (LOA: 280m max) |
4 vessels (0.8nm separation) |
– Storm refuge – Machinery repairs – Medical emergencies |
– Priority to vessels in distress – Must maintain VHF Ch16/14 – No cargo operations |
– Free of charge for emergencies – Tugs on standby during cyclones – Nearest hospital: Mongla (22nm) |
| Paira Pilot Station Anchorage | 21°47’05″N 89°32’10″E (WGS84 Datum) |
1.2 ±0.05 | 10-15 (CD) +2.0m HW springs |
Hard Clay Holding power: Excellent |
20,000 DWT (LOA: 160m max) |
2 vessels | – Pilot transfer – Customs clearance – Document exchange |
– Max stay 6hr – Must keep engines ready – No anchoring if pilot boat alongside |
– Pilot fee: $350/vessel (2024) – Available 24/7 – No cargo operations |
| Paira Quarantine Anchorage | 21°46’40″N 89°31’25″E (WGS84 Datum) |
0.8 ±0.05 | 9-11 (CD) +1.8m HW springs |
Silty Clay Holding power: Fair |
15,000 DWT (LOA: 150m max) |
3 vessels | – Health inspections – Crew medical checks – Sanitation control |
– Yellow flag must be shown – No shore contact permitted – Avg inspection time: 4hr |
– Health inspection fee: $200 – Mandatory for vessels from plague-affected ports – Medical waste disposal available |
Hydrographic & Environmental Data:
- Tidal Information:
- Mean Spring Range: 4.2m (MHWS 3.8m, MLWS -0.4m)
- Mean Neap Range: 2.1m (MHWN 2.4m, MLWN 0.3m)
- Highest Astronomical Tide: 5.1m (June-July)
- Tide Tables: BIWTA Publication T-2023 (updated monthly)
- Current Patterns:
- SW Monsoon (Jun-Sep): 3.2-4.0kt SW setting
- NE Monsoon (Dec-Feb): 2.0-2.8kt NE setting
- Slack water: ±45min from HW/LW Mongla
- Seafloor Characteristics:
- Outer Anchorage: 1-2m sediment mobility/year
- Inner Anchorage: 3-4m sediment mobility/year (annual dredging required)
- Wrecks: 2 known obstructions (21°49’N 89°34’E & 21°44’N 89°29’E)
Navigation & Safety Regulations:
- Pilotage Requirements:
- Mandatory for: >500 GT or LOA >50m
- Boarding position: 21°45’N 89°30’E (Outer Anchorage)
- Night pilotage: Additional 30% fee, requires 24h notice
- Pilot ladder: Must comply with SOLAS Reg. V/23
- Anchoring Procedures:
- Minimum scope: 5:1 in fair weather, 7:1 during storms
- Drag testing: Required after anchoring (3x vessel length movement check)
- Anchor watch: Mandatory 24/7 with GPS anchor alarm
- Emergency Protocols:
- Cyclone signals:
- Signal III: Prepare to evacuate
- Signal IV: Immediate departure required
- Oil spill response: Must follow MPA Contingency Plan (2022 edition)
- Cyclone signals:
Operational Restrictions:
- Prohibited Activities:
- Outer Anchorage: No fishing within 1nm
- Inner Anchorage: No vessel-to-vessel transfers after sunset
- All anchorages: Zero discharge policy (12nm zone)
- Special Area Requirements:
- Vessels >10,000 DWT: Must submit ETA 72h in advance
- Carriers of hazardous cargo: Additional 0.5nm separation
- Vessels with defects: Must anchor in designated repair zone
Commercial Operations:
- Port Charges (2024):
- Anchorage fees:
- Outer: $0.085/GT/day (min $850)
- Inner: $0.125/GT/day (min $1,250)
- Lighterage: $8.50-12.00/ton (depending on commodity)
- Anchorage fees:
- Bunkering Services:
- Available at Outer Anchorage only
- Approved suppliers: BPA License Holders List 2024
- Max transfer rate: 150m³/hr
Critical Reminders:
- All vessels must display proper anchor lights (COLREG Rule 30)
- Daily position reports required via BPA e-Navigation system
- Non-compliance may result in fines up to $50,000 under BPA Regulation 12-2023

