Analysing encounters and transshipments using oceanographic information and measurement tools

You can click on an encounter or likely transshipment on the map or in the vessel information window to find out how long the event lasted and between which vessels the encounter occurred.

Zooming in reveals the detailed vessel tracks at the time of the encounter. By tapping the arrow keys or dragging the time slider the detailed vessel movements throughout the encounter or transshipment, including speeds and orientations, can be observed.

During an encounter or transshipment event in Starboard, vessels may be up to 200 metres apart.

If two vessels seem far apart during an encounter the vessel’s dimensions and the measurement tools can be used to determine whether it was possible that the two vessels had an encounter.

Try it out: See measurement circles being used to assess an encounter between a Tuna purse seiner from the Marshall Islands and a carrier vessel.

The line measurement tool enables an estimation of how long it might take for vessels to reach one another based on the speed they might travel. This can be useful for reviewing an inferred transshipment event, for example if a vessel nearby was not reporting on AIS and may have potentially been involved in a transshipment.

Try it out: See the line measurement tool being used to determine if the JIN HAI 866, during a period of loitering and missing AIS, could have met with the fish carrier HUAXIANG8 during its inferred transshipment event.

Oceanographic information is used as part of the rules based algorithm to determine if it would be possible for a transshipment to occur. This includes wind and wave conditions.

Try it out: View the wind conditions for the JIN HAI 886 during the potential transshipment