Multipass Voyage Tools
Crew-first tools for checking marine weather along an intended passage and organizing the information needed before preparing or reviewing the official berth-to-berth passage plan.
Practical maritime support without an enterprise contract, specialist sales process, or fleet-sized budget.
One voyage structure
Departure, destination, sailing time, speed, vessel particulars, and route points should be entered once. Voyage Weather will use them first. Passage Appraisal will later add navigational checks and company-supplied requirements to the same saved voyage.
First functional module
Check forecast wind, waves, and swell along the expected route and timeline, rather than seeing conditions only at the departure and arrival ports.
First practical question
Where and when are the most demanding forecast conditions expected along this passage?
Second module
Organize the information required before the navigating officer prepares or reviews the official berth-to-berth passage plan.
Intended role
Preparation, organization, and review support—not automatic approval and not a replacement for official navigation systems.
Manual voyage planner
Calculate staged distance, ETA, and estimated daily positions. Custom NOAA weather generation will be connected after the public route workflow has per-voyage storage and processing limits.
Enter coordinates in voyage order. Intermediate points may be added or removed.
Voyage
Hamburg → Buenos Aires
Staged distance
6626.0 nm
Passage duration
17.3 days
Estimated arrival UTC
31 Aug 2026, 18:07
Route timing and daily positions are estimated from the coordinates, ETD, and average speed entered above.
Move over the map to inspect coordinates
Voyage Day 1
departure
53.55°N, 9.99°E
Hamburg departure → German Bight
Voyage Day 2
daily
51.63°N, 0.67°E
German Bight → English Channel
Voyage Day 3
daily
47.66°N, 7.04°W
English Channel → Bay of Biscay
Voyage Day 4
daily
42.01°N, 10.86°W
Bay of Biscay → Western Iberia
Voyage Day 5
daily
35.88°N, 13.06°W
Western Iberia → Canary Islands
Voyage Day 6
daily
29.98°N, 16.01°W
Western Iberia → Canary Islands
Voyage Day 7
daily
24.14°N, 18.93°W
Canary Islands → Cape Verde
Voyage Day 8
daily
18.34°N, 21.83°W
Canary Islands → Cape Verde
Voyage Day 9
daily
12.39°N, 24.29°W
Cape Verde → Equatorial Atlantic
Voyage Day 10
daily
6.36°N, 26.44°W
Cape Verde → Equatorial Atlantic
Voyage Day 11
daily
0.48°N, 28.91°W
Equatorial Atlantic → Northeast Brazil
Voyage Day 12
daily
5.01°S, 32.21°W
Equatorial Atlantic → Northeast Brazil
Voyage Day 13
daily
10.72°S, 35.09°W
Northeast Brazil → Southeast Brazil
Voyage Day 14
daily
16.69°S, 37.48°W
Northeast Brazil → Southeast Brazil
Voyage Day 15
daily
22.66°S, 39.86°W
Northeast Brazil → Southeast Brazil
Voyage Day 16
daily
27.36°S, 44.76°W
Southeast Brazil → Rio de la Plata
Voyage Day 17
daily
31.98°S, 49.80°W
Southeast Brazil → Rio de la Plata
Voyage Day 18
daily
34.41°S, 56.34°W
Rio de la Plata → Buenos Aires approach
Voyage Day 19
arrival
34.60°S, 58.30°W
Rio de la Plata → Buenos Aires approach
Planning boundary
Distances are calculated between user-entered coordinates using simplified staged geometry. This does not account for charted hazards, traffic separation schemes, restricted areas, draught, UKC, weather routing, company requirements, or Master’s approval.
NOAA demonstration forecast
The forecast below demonstrates the weather-analysis pipeline. It is not automatically regenerated from the manual voyage entered above yet.
The port, berth, anchorage, or route position where the voyage assessment begins.
The intended arrival port, berth, anchorage, or route position.
The expected sailing time used to align forecast conditions with the vessel’s progress.
The expected average speed used to estimate when the vessel may reach each route section.
A latitude and longitude used to describe the intended route and sample forecast conditions.
The modelled date and time associated with conditions at a route point.
Safety and source boundaries
Crew-first must also mean honest limits. Multipass should explain where its information comes from, what it can assist with, and what remains the responsibility of the bridge team and official systems.
Every forecast and navigational reference must identify its source, model run, forecast time, and update time.
Multipass will not infer company-specific UKC, speed, reporting, or navigation requirements. These must be supplied from the applicable SMS, standing orders, voyage instructions, or official company publications.
Model forecasts are estimates and may change. They must be compared with warnings, observations, onboard instruments, and updated official information.
Multipass does not replace ECDIS, official charts, navigational publications, route checking, the navigating officer, bridge-team procedures, pilotage, or the Master’s approval.
Navigational limitation
Multipass Voyage Tools provide forecast interpretation, preparation, and decision support. They do not constitute an approved passage plan or navigational instruction and must not be used as the sole source for safe navigation.