A tool that allows ships to avoid collisions with large marine mammals.

REPCET® is the first on-board computer system able to monitor whale positions thanks to a 10 years collaboration with shipping companies, environmental actors and engineers. Its aim is to limit the risk of ship strikes, one of the leading causes of accidental mortality of large cetaceans.

Ship strikes between ships and large cetaceans are accidents of great concern. In the North-Western Mediterranean Sea, 16 to 20% of whales found dead were involved in a ship strikes. Limiting risks implies to raise awareness, gain a better understanding of the problem and develop technological solutions.

The REPCET® software has been designed to preserve cetacean populations and ensure passengers’ safety on board. The REPCET® system allows reporting, sharing and receiving in real time the sighted cetacean positions within a network of subscribers. Today, 39 vessels are equipped with the system and actively participate in the smooth running of the network. Five institutions are also equipped with the shore interface.

A 2 hours training is provided to bring knowledge to the crew members about collisions and cetacean identification.

REPCET® software prevents collisions between vessels and large cetaceans and so contributes to the cetacean conservation and passenger security.


Summary of observations recorded on REPCET® in 2020

The REPCET® system allows the real-time sharing of large cetacean positions between different vessels. REPCET® is a collaborative network, so when an officer sees a cetacean, they can transmit the position of the cetacean to the network of equipped vessels through REPCET®. This sharing of positions allows vessels to take appropriate measures to limit collision […]

A new vessel equipped and two REPCET® trainings given

On April 8, a new vessel was equipped with REPCET®. This ship is the MONACO ONE: a 12-metre catamaran chartered by SMIP (Société Monégasque Internationale Portuaire). It joins the network of equipped vessels and will be able to contribute to sharing in real time the position of cetaceans that may be encountered during the navigations. […]

Summary of observations recorded on the REPCET® software in 2019

In 2019,  1051 observations were reported on the REPCET® software in the Mediterranean sea and other seas or oceans. Large cetaceans such as fin whales and sperm whales are increasingly reported on the REPCET® interface. In 2014, they represented 25% of cetaceans recorded in the software and in 2019 they represented around 50% of all […]


Collect new data to enhance knowledge of fin whale and sperm whale movements in the Pelagos Sanctuary and improve the system.

raising awareness of the problematic of ship strikes and raising awareness of cetacean identification among seagoing personnel.

REPCET® software has been designed to preserve cetacean populations and ensure passenger safety on board on ferries.