How AIS Works - Operation of AIS

The term Automatic Identification System (AIS) refers to a radio system that improves the safety and guidance of vessel traffic by exchanging navigation and other vessel data.

OHB subsidiary LuxSpace’s satellite for global ship monitoring has reached its target orbit.

At sea, space technology is used to help save lives every day: managing traffic between ships, picking up migrants and refugees in distress or spotting oil spills. The European Space Agency is once again at the forefront developing new technologies and satellites: to keep us safe at sea and to monitor the environment. Space makes a difference here on Earth and certainly at sea where there is no infrastructure.
Recommendation by Marine-Pilots.com
AIS services are offered by, for example:

Using pictures and sketches, this video finally explains the difference between gross tonnage (GRT) and net tonnage (NRT); the ship spaces that are included/excluded in their calculation; and the importance of these terms to ship owners.
Contents of this video will benefit mariners preparing for exams (written and oral examinations).

The role of a Tug Master undertaking harbour towage activities is a very specific one. He/she has to, alone or in cooperation with other Tug Masters, assist a ship in a safe and efficient way using his/her tug to the best of its qualities. 

The SW England Branch debates the varied and critical role of the Harbourmaster.

Briese research are extending their cooperation with Nautitec for their research training projects. As from immediate effect, a model of the research vessel “Maria S. Merian” can be used for tailor made training at NAUTITEC´s Leer-based simulator facilities.

Ingemar Virtual Harbour with some of the 2019 designs

In the video shared, made by the Coast Guard communication department during the training days held at the Decimomannu and Pescara bases, some of the phases of the training, such as take-off-departure and 'winching' the pilot on board, are illustrated in sequence.