Video

The difference between Gross Tonnage and Net Tonnage


published on 14 July 2020 988 -

Found on YouTube. Created by "Steering Mariners".
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).
What's your opinion on this?
Login or register to write comments and join the discussion!
Read more...

Article IHO Nautical Information Provision Work Group endorses Guide for Nautical Data 2.1

by IHMA - International Harbour Masters Association Secretary IHMA - published on 30 January 2025

During a meeting on 4 December 2024, the International Hydrographic Organization Nautical
Information Provision Work Group (IHO NIPWG) held a vote on the new Guide for Nautical
Data 2.1. The guide was unanimously endorsed.

0

Video Spiral-Test -Manoeuvre for detailed identification of Yaw Stability using Samples of Cruise Ship

published on 29 September 2021

This video shows an introduction on the Spiral-Test-Manoeuvre and describes the procedure how to steer through this manoeuvre and measure the data needed. The results will be displayed in a characteristic diagram allowing to identify stable and unstable conditions and related, detailed information, e.g. spiral loop width and height, rudder angle of neutral effect. Samples of stable and unstable ship behaviour demonstrations will be shown by Fast Time Simulation using the SAMMON Planning tool.

0

Video Education: Effect of Drift Force and unstable moment

published on 20 June 2024

SAMMON Lecturing Video describing
"Effect of Drift Force and unstable moment"
-------------------------------------------------------------
SAMMON - the IDEAL tool to identify manoeuvring capabilities of a ship - SAMMON - learning the EFFECTIVE way

1

Article New Study on GNSS Interference in the Baltic Sea

by GPSPATRON Sp. z o. o. - published on 12 March 2025

GNSS interference has become a growing challenge in the Baltic Sea, affecting maritime navigation, aviation, and critical infrastructure. While numerous datasets and services, such as gpsjam.org, spoofing.skai-data-services.com, and flightradar24, report high-altitude GNSS interference based on ADS-B data, there is a significant lack of studies focusing on ground-level interference.

3

Video Live test: Backpack & Lifejacket?

published on 30 September 2021

When publishing articles or pictures about pilots and their pilot ladders, very often we see the use of backpacks. The use of backpacks is controversial, since its weight, or buoyancy, can influence the functioning of the lifejacket used.

2

Article Crowley Completes First U.S. Design for Fully Electric Tug

published on 21 April 2021

Crowley Engineering Services has completed the design of the first fully electric U.S. tugboat with autonomous technology — providing operators a sustainable and high-performing solution for ship assist and harbor services in any port.

0

Video The perfect pilot ladder

published on 9 September 2022

Top condition. Quality assurance with label, certificate and registration. Truly exemplary work in the service of safety for pilots. Great to see that.

3

Video History: River Thames Pilot (1960-1969)

published on 18 May 2020

Location: England Various shots following a river pilot. He is seen disembarking from one boat and climbing up a rope ladder onto a large ship. Various shots of another river pilot, dressed in a cap, woollen jumper and sea faring jacket. He is seen at the wheel of his boat. Various shots of two river police pilots on the River Thames in London. They are filmed in the cab and on the deck of their boat. They pull up alongside some riverboat houses and talk to a woman who owns one of the them....

1

Video Falmouth Pilot Cutter Pellew

published on 1 July 2022

Built by Luke Powell and his working Sail Yard in Truro, Cornwall, launched in February 2020. The lines were taken from the Vincent, a Falmouth Pilot cutter built in 1852 for the Vincent family of St Mawes. She worked for 70 years as a pilot boat, finally retiring in 1922 and ending her days as a houseboat on the Percuil River very close to the yard where she had been built. When the idea to build a new pilot cutter of considerable size was born, the lines of Vincent were seen as the...

1

Article Report on P&I claims involving vessels under pilotage

published on 1 September 2021

The scope of this report covers a twenty-year period between 1999 and 2019 in which there were 1,046 such recorded incidents and where each incident gave rise to P&I liabilities in excess of US$100,000.

0