In English

Man Overboard detecting systems based on wireless technology

Emil Örtlund ; Malin Larsson
Göteborg : Chalmers tekniska högskola, 2018. 47 s.
[Examensarbete på grundnivå]

The cruise industry is an industry on the rise, and the large amounts of passengers inevitably lead to an alarming number of man overboard situations. Most of the passengers and crew who have fallen overboard are never to be found again, a problem not only of the humanitarian sort but also something that brings negative publicity to the cruise industry.

This report investigates the possibility for more rapid notification of the crew if a person has fallen overboard, and increase the possibility of locating said person, using wireless radio transmitters. The decision of what wireless technology to use is based on a literature study and the chosen technology was then field tested in a maritime environment. The results were analysed and the possibility of using said technology in an automated man overboard system was further evaluated.

The technology selected after the initial literature study was LoRa, an LPWAN-technology. Two simple LoRa-transceivers were obtained and the performance were tested on board a passenger ferry. The attenuation caused by submersion in water were examined as well.

Based on the results of the literature study as well as the field tests a conclusion could be made that using wireless technology to detect and track a man overboard, on a large cruise ship, is difficult. This is mostly an effect of the physical limitations radio wave transmissions have in combination with water.

Nyckelord: Man Overboard, Tracking, LPWAN, LoRa, Wireless

Publikationen registrerades 2018-11-09. Den ändrades senast 2018-11-09

CPL ID: 256283

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