NP3b2020 VMS pelagic gear

The theme shows fishing with non-bottomed gears within the Natura 2000 areas. Fishing with non-bottom catching gears has been calculated for pelagic trawls including purse seine fishing in the period 2013-2018. The fishing is shown on the map with VMS data. VMS data are shown less frequently on the map than AIS data, as these only have to be sent once per hour from vessels above 12 metres. The points shown are for a given speed of the vessel where it is assumed that fishing can take place. Filename: np3basis2020_vms_pelagic本数据集主题为Natura 2000保护区内使用非底拖渔具的捕捞活动。本次统计的非底拖捕捞作业涵盖2013至2018年间的中上层拖网（含围网捕捞）作业。该捕捞活动的空间分布通过船舶监控系统（Vessel Monitoring System, VMS）数据在地图上进行可视化呈现。由于仅总长度12米以上的船舶需每小时上报一次VMS数据，因此地图上VMS数据的展示频率低于自动识别系统（Automatic Identification System, AIS）数据。图中展示的点位对应船舶处于假定可开展捕捞作业的特定航速区间。数据集文件名为：np3basis2020_vms_pelagic