AIS Shipping Traffic - Average weekly density of vessels engaged in dredging or underwater operations 2012 - 2017 (time aware)
This map layer has been supplied directly by Marine Scotland National Marine Plan interactive. You can obtain additional information about the layer on this page
Automatic Identification System (AIS) is a maritime navigation safety communications system adopted by the International Maritime Organization (IMO) to provide vessel information, primarily for the purposes of maritime safety. AIS data are collected by various organisations and can be analysed to provide a source of spatial information about vessel movements within the geographical limits of the system. This layer shows the average weekly shipping density, of vessels engaged in dredging or underwater operations, for northern UK at 2km grid resolution, featuring multiple years for NMPi's time-aware functionality.
AIS datasets were sampled from the first seven days of each month, commencing with January, at monthly intervals. The total value for all 12 weeks was divided by 12 to determine the weekly average, therefore decimal values may occur for certain cells. The weekly average was also multiplied by 52 to provide the estimated annual average.