North Sea near misses under scrutiny
The Dutch Ministry of Infrastructure and the Environment has asked
MARIN to develop methods to automatically detect near misses and other hazardous encounters in the North Sea from AIS data.
T
he North Sea is one of the busiest shipping areas in the world. By monitoring AIS signals transmitted
by ships, the Coastguard is able to monitor the current traffic situation and assist ships. For the Dutch Ministry of Infrastructure and the Environment, it is important to monitor any changes in the safety levels of traffic at various locations, particularly busy junctions for example.
A clear indicator of the level of safety at a location is the number of accidents that occur. Fortunately, however, accidents are few and far between, so this does not deliver a detailed picture of the safety levels at all locations.
Risk models There are two ways to compensate for this lack of accident data. One is by a risk model whereby statistics are used to make inferences about accidents that may happen at a location based on accidents that occurred at similar locations and in similar conditions. Another way is to look at a broader data set for the particular location: not only accidents but also encounters that nearly resulted in accidents. However, these ‘near misses’ are often not reported. Therefore, MARIN was asked to develop methods to automatically detect these near misses and other dangerous encounters from AIS data.
Erwin van Iperen
e.v.iperen@marin.nl
16 report
Figure 1: Animation of two consecutive hazardous encounters of a northbound small ship with two westbound ships. Equally coloured ships indicate positions at one particular moment.
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24