Voyage Schedule Planner Online

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Voyage Ops Core SEC // MULTI-PORT-PLAN

Multi-Port Voyage Scheduling, Laytime & Dual Fuel Bunker Estimator

Accurate voyage scheduling across multiple port rotations is essential for Master Mariners, operations teams, and chartering brokers. In commercial shipping, passage planning extends beyond a simple two-point transit: it requires a coordinated timeline factoring in unberthing ETD, weather allowances (Sea Margin %), canal transit queues, cargo operations (Port Stay / Laytime), and time zone shifts across ports of call.

The Master's Voyage Schedule & Bunker Planner Pro automates multi-port scheduling. It eliminates manual UTC arithmetic errors, supports customizable speeds per leg, tracks dual-fuel consumption (VLSFO/HFO at sea vs. LSMGO/MDO in port), and formats clean itinerary estimates ready for export to Excel, JSON, and chartering correspondence.

Timeline Automation
Cascade ETA Engine
Instant forward recalculation of all subsequent ETA/ETD milestones whenever departure dates, steaming speeds, or port stays are modified.
Fuel & Efficiency
Dual Fuel Bunker Tracker
Distinct tracking of main engine fuel consumption during sea passages alongside auxiliary machinery fuel consumption during port stays.
Commercial Workflow
RTA Tool & Email Generator
Reverse solver to calculate the required ETD for a target ETA, alongside one-click formatted text generation for charterers and agents.

Frequently Asked Questions (Voyage Scheduling FAQ)

How does the Sea Margin % influence passage timing?
In maritime navigation, calm-water speed rarely reflects actual sea conditions. The Sea Margin (typically 5%–10%) accounts for adverse wind, swell, and counter-currents, providing realistic steaming times and preventing premature Notice of Readiness (NOR) tenders.
How can I manually adjust an ETA for a specific port?
If a port authority assigns a fixed berthing slot, you can edit the local datetime directly in the ETA cell. The system flags it as a manual entry and cascades subsequent port schedules from that milestone. Click “↺ Auto” to restore formula-based calculation.
How does the RTA (Required Time of Arrival) reverse calculator work?
When charterers mandate an exact pilot station arrival time (e.g., to catch a high-water tide or canal convoy), the RTA tool computes the required departure time from the origin port based on distance, speed, and margin, and applies it to Port 0 in one click.
How are timezone shifts normalized across global routes?
All internal calculations run on continuous UTC epoch timestamps. Local port times (LT) are derived by applying the designated timezone offset (UTC-12 to UTC+14), preventing calendar day errors when transiting the International Date Line or navigating long East-West ocean legs.
Is my voyage data preserved when closing the browser?
Yes, all ports, speeds, bunker figures, and vessel particulars auto-save in browser LocalStorage. The “Save (.json)” button exports complete voyage files for cross-device transfer and archival records.
Operations: Multi-Port Rotation, Laytime & Port Stays
Fuel: Dual Fuel Tracker (VLSFO, LSMGO, HFO, Biofuel)
Export: Excel (.CSV), JSON, Email Text, Print A4

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