⛽ How can I view and analyze bunker inventory and track consumption over time using the BDN timeline?

⛽ 1. Bunker Inventory Overview

The Bunker Inventory overview displays all bunkering operations for a selected ship and year.

Key features:

• Filter by:
  • Ship group
  • Ship
  • Year
• Table-based overview of all BDNs

Displayed information includes:

• Bunker date
• BDN number (clickable)
• Bunker port
• Fuel types (e.g. LSFO, MGO)
• Bunkered quantities
• Calculated ROB
• Reported ROB
• Fuel consumption ("Used up")

👉 The overview allows you to quickly verify:

• Total fuel received
• Remaining fuel on board
• Differences between calculated (by consumption reported) vs. reported ROB

📊 2. BDN Timeline (Detailed View)

Clicking on a BDN number opens the detailed BDN timeline view.

This view provides a step-by-step breakdown of how the bunkered fuel is consumed over time.

🔎 BDN Details Section

At the top, key BDN information is displayed:

• Fuel type (e.g. MGO – Fossil)
• Quantity bunkered
• BDN number
• Bunker port
• Receiving ship
• Bunkering start and end time
• Supplier details

📈 Timeline Table

The timeline shows all relevant events after bunkering, such as:

• Noon reports
• Departure / Arrival events
• Anchor events

For each entry, the following data is shown:

• Timestamp
• Event type
• Voyage number
• Port / Anchorage
• Fuel consumption
• Reported ROB (Remaining on Board)
• Calculated ROB
• Deviation between reported and calculated ROB
• Split reported deviations (if applicable)

⚙️ How it works

• Each BDN is treated as an individual fuel batch
• The system tracks how this fuel is consumed over time
• Consumption values are taken from ship reports
• Calculated ROB is continuously updated based on consumption
• Reported ROB comes from ship reports

👉 This allows users to:

• Monitor fuel usage accuracy
• Identify discrepancies
• Track fuel depletion across voyages

⚠️ Sounding Corrections Handling

Sounding corrections reported by the ship are handled automatically by the system:

• Correction values are split across the relevant events in the timeline
• The individual correction values and their total sum are transparently displayed
• This ensures full traceability of adjustments applied to fuel quantities

👉 In the Event-based Data module, this is reflected by:

• A dedicated column next to “BDN-based Consumption”
• Clear visibility of how corrections impact the fuel balance over time

⚠️ Deviations & Data Quality

Differences between:

• Reported ROB and
• Calculated ROB

are automatically highlighted.

These deviations may indicate:

• Reporting inconsistencies
• Measurement inaccuracies
• Data entry issues

👉 This makes the module a valuable tool for data quality control and fuel tracking.

Best Practices & Notes

💡 Always review deviations between calculated and reported ROB to ensure data consistency.

💡 Use the timeline view to investigate unusual consumption patterns.

💡 Pay special attention to soundings and their corrections.

💡 Combine this module with the Event-based Data module for deeper analysis and corrections.