Marine Technology

An eductor is a simple version of a pump used to move a liquid form of a fluid out of a certain place.

However, unlike more complex versions of pumps, they do not have any mechanised components or moving parts that create an external force to transport a certain quantity of water. Instead, they rely on the simple theory of Bernoulli’s principle and a specific case of this, the Venturi effect.

What is Bernoulli’s principle?

As we know from the classical theory of fluid mechanics, Bernoulli’s...

https://www.marineinsight.com/tech/what-is-eductor-on-a-ship/

The available sea depth, the distance from the mean water level to the seafloor, is often an essential parameter for consideration. For navigation of vessels (refer to the article on underwater keel clearance), fishing, oil explorations, rigging, research, and various purposes, estimating the depth of the ocean bottom is indispensable.

An echo sounder is a system that helps understand what is underneath and has been used by most seagoing ships for a long time. This system, which is one of the...

https://www.marineinsight.com/tech/what-is-an-echosounder/

I still remember the day when I joined my maiden vessel more than a decade ago. A Supramax bulk carrier with the least automation and the most troubles. I was welcomed by a lot of judgemental yet uncaring eyes.

A new Cadet is on board! To add some spice to it, he’s a first-timer and presumably stupid; An old and tough Soviet Chief Officer who’s pissed because he couldn’t sign off in the last port.

Rain poured down the sky, and the day couldn’t get gloomier beyond imagination. I was shown my...

https://www.marineinsight.com/tech/ballast-water-treatment-system-a-boon-for-many-a-menace-for-some/

Every seafarer is familiar with the term bunkering and has either participated in or at least seen the operation of bunkering whilst he or she is on board. They may have also seen samples collected from the bunker manifold through drip sampling. Taking four samples is the norm, 1 for the supplier, 1 for MARPOL, 1 for the ship and 1 for lab analysis.

Shipping companies have a tie-up with bunker sample analysing labs, and the labs provide ships with a sampling kit. Using the kit, samples are...

https://www.marineinsight.com/tech/marine-engineer-should-check-in-a-lab-analysis-report-of-fuel-oil/

As anyone working in the shipping industry will attest to, bunker (or fuel) is one of the biggest expense items for any container shipping company.

According to most estimates, bunker costs comprise circa 50% to 60% of a carrier’s total operating expense, thus making it by far the largest component of the carrier’s variable cost base.

Bunker prices consequently exert an inordinately higher influence on any shipping company’s cash flows and have the potential to make or mar its fortunes.

Matters...

https://www.marineinsight.com/tech/reduce-bunker-spend-of-your-ships/