Canal Transit
A convoy of marks advances up the canal cut and each one all but stops between the lock gates while the chamber level lifts it to the upper reach.
CSS
Shiprouting
15 animationsComposite Track
A great-circle track is flattened against a limiting-latitude rule into a composite passage, the cap opening back out to the full circle and closing again as the limit parallel rises and falls.
CSSPremiumCurrent Assist
A field of stream lines flows across the chart while accent packets run the planned track and accelerate through the core of the current, the speed-over-ground rail below extending past the through-water tick.
CSSPremiumDepression Avoidance
A set of closed isobars deepens and fills over the chart field while the planned track bows away from the centre and eases back onto the direct line between the same two ports.
CSSPremiumETA Confidence
An arrival-time cone anchored on the berth window narrows steadily as the vessel mark advances along the voyage axis toward it, closing to a tight band on arrival.
CSSPremiumGreat Circle and Rhumb Line
Across a meridian graticule a straight rhumb line holds while a great-circle arc bows poleward from the same two ports, the lens of saved distance between them shading as the arc completes.
CSSPremiumHigh-Risk Area
A dashed high-risk boundary holds over the chart while the passage routed clear of it retracts, an escorted corridor opens across the zone and the direct track draws through, then the deviation is restored.
CSSPremiumIce Limit
A hatched ice edge advances south across the chart and pushes the passage track ahead of it, both recovering northward as the limit retreats from the fixed limit-of-ice rule.
CSSPremiumIsochrone Fan
Day-by-day time fronts sweep out from the departure mark as a widening fan across a sampled field, the planned track threading forward through the day ticks they leave behind.
CSSPremiumJust-In-Time Arrival
A speed band relaxes off full sea speed while the steaming block on the passage timeline below lengthens by exactly what the waiting block at anchor gives up, arrival staying pinned on the berth window.
CSSPremiumRoute Options
Three candidate passages between the same pair of ports are lit in turn beside their cost bars until the cheapest is held bright and the other two recede.
CSSPremiumSpeed Cost Surface
Nested cost contours over a speed-against-consumption field hold still while the operating point is swept either side of the optimum and returns to the basin, the consumption bar rising with it.
CSSPremiumStrait Queue
Vessel marks held in a waiting box off the narrows creep forward a slot at a time and are released one by one into the separation lane to run the strait.
CSSPremiumSwell Window
A train of parallel swell crests marches across the chart while the seakeeping window band on the track opens and closes with the encounter angle.
CSSPremiumWind Assist
A field of wind barbs veers column by column across the chart while thrust bars standing on the track rise and fall with the angle beneath each column of barbs.
CSSPremium