Bart 🌊⚓️ Profile picture
Senior Maritime Pilot | Master Mariner | Master's degree Nautical Science | Forensic Medicine | Glassblower |
Jun 3 • 21 tweets • 8 min read
1/x Back to D-Day. The Allies were planning to try to land about 150.000 troops on the 5 beaches of Normandy on June 6. But you need to get to the beach first Image 2/x The Germans were lacking gun batteries in Normandy as they had concentrated them around Pas de Calais. Their defense strategy leaned heavily on massive minefields to stop any Allied assault before it even reached the French coast. Image
Jun 3 • 12 tweets • 4 min read
1/x So, a lot of replies that look like "But the ship had a Malagasy flag, so it wasn't stateless (no nationality)." Let me try to explain. The relationship between the flag and the registry can be somewhat complicated. One country can have several registries. 2/x The full explanation of the relationship flag/registry can be found in a thread I wrote a few months ago, so read it if you're interested, but I'm not going to repeat the whole story here. I'm going to focus on MT Tagor.
Jun 2 • 17 tweets • 6 min read
1/x On June 2, 1944, just four days before the Normandy landings, what was occurring on that day? Well, the planners of Operation Neptune (the naval side of D-Day) faced a major problem: how to guide the first waves of landing craft accurately to their beaches in the dark? Image 2/x The solution was Operation Gambit, a high-risk mission using X-class midget submarines to act as human navigation beacons. On the evening of June 2, two X-craft slipped out of their base in Britain. Image
Jun 2 • 16 tweets • 6 min read
1/x Some more D-Day history. Another person who was crucial to the success of not only D-Day, but also the landings in North Africa, Italy, and the Pacific. Andrew Higgins. Image 2/x Higgins was an American businessman and boatbuilder. In 1926, he designed the Eureka boat, a shallow-draft craft for use by oil drillers and trappers in operations along the Gulf coast and in the lower Mississippi River. Image
Jun 1 • 20 tweets • 7 min read
1/x So, in 5 days, we remember D-day, and I would like to talk about the nautical charts and tidal info that were used and which were critical in a successful operation. I would like to talk about 1 critical person, Hugo van Kuyck. Image 2/x Hugo van Kuyck was born on December 1, 1902, in Antwerp, Belgium. From a young age, Hugo was fascinated by the sea. At age 15, he designed and built his first sailboat, Zwaluw 1 (Swallow 1), followed by Zwaluw II. (photo of Zwaluw 1) Image
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May 15 • 27 tweets • 10 min read
1/x I regularly get asked: “How many containers are typically lost at sea?” Overall, it’s not as bad as people think. In 2024, 576 containers were lost, out of roughly 250 million transported by sea each year. Image 2/x 2024 saw an increase in containers lost due to ships rerouting in response to attacks on merchant shipping in the Red Sea. These disruptions led to a significant rerouting of vessels, with a 191 percent increase in transits around the Cape of Good Hope. Image
May 14 • 31 tweets • 12 min read
1/x I'm about to leave for a holiday, so my timeline might be a bit quieter. However, I want to share the story of the MSC Napoli. I previously wrote a thread about it in Dutch, but I find it to be an interesting case. Image 2/x The MSC Napoli was a container ship with a capacity of 4,418 TEU and 276 m long. It operated on the South Africa–Europe route and called at the European ports of Felixstowe, Hamburg, Antwerp, Le Havre, and Sines. Image
May 12 • 23 tweets • 7 min read
1/x You might have heard of it, the ISM code or International Safety Management Code. Seafarers have a love-hate relationship with it as well. Where does it come from, and what does it do? Image 2/x As usual in shipping, it all stems from disaster, and this time it was the Herald of Free Enterprise disaster in March 1987. A roll-on/roll-off passenger ferry capsized shortly after leaving Zeebrugge, Belgium, due to the bow doors being left open. It resulted in 193 deaths. Image
Apr 21 • 14 tweets • 4 min read
1/x You've probably encountered these AI videos of ships dumping garbage in the sea. Not true, of course, but how is garbage regulated at sea? a small đź§µ 2/x MARPOL, formally known as the International Convention for the Prevention of Pollution from Ships, is the primary international treaty established by the International Maritime Organization (IMO) to prevent marine pollution by vessels. Image
Apr 19 • 20 tweets • 8 min read
1/x OK. This time, we’ll look at how we actually calculate a tide in practice. First, a quick recap. What we know so far:
a. Tides are caused by tidal forces from celestial bodies. 2/x b. The shape of continents, seabed, etc., makes every tide completely different and unique from place to place, just like a fingerprint.
c. Every movement of Moon and Sun (Moon’s rotation, Earth’s rotation, Moon’s orbit, Sun’s orbit, etc.) is a small part of the total tide.
Apr 19 • 31 tweets • 10 min read
1/x Back to fun stuff: I'm going to try to explain the tides. Where do they come from, and how do we calculate them? I might have to split it into several threads because it's actually a lot and can be complicated. Image 2/x The first topic is the origin of tides. Most people say that tides are caused by the Moon's gravity, which attracts water towards it. This is why we experience high water (HW) on the side of the Earth facing the Moon. Yay! Cool and all, but why then 2x HW per day...? Image
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Apr 15 • 24 tweets • 8 min read
1/x I notice many people confusing "transit passage" and "innocent passage" regarding the Strait of Hormuz. There also appears to be uncertainty about what qualifies as an "international strait." Let's clarify the differences. đź§µ Image 2/x Those two terms stem from UNCLOS 1958 and UNCLOS 1982. If you want a history of how UNCLOS came to be, check the link below:
Apr 9 • 24 tweets • 8 min read
1/x I guess I have to deal with the Bosphorus Strait and the Dardanelles and their status as well, so here goes: They're essential strategic waterways that links the Black Sea with the world’s oceans. The Bosphorus also separates Asian Türkiye or Anatolia from European Türkiye. Image 2/x After WW1, the Armistice of Mudros (October 30, 1918 ended hostilities between Ottoman Turkey and the Allies. The Mudros document's 25 articles gave the Allied Powers the right to use the Dardanelles and Istanbul Straits freely and occupy fortifications on their shores. Image
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Apr 9 • 20 tweets • 7 min read
1/x The comparison between the Suez Canal and the Strait of Hormuz is crooked, as the Strait of Hormuz is defined in UNCLOS82 as an international strait with the right of "transit passage" (not "innocent passage", that's UNCLOS58). But what about Suez? A smallđź§µ Image 2/x The big difference is, of course, that the Canal is man-made and not a natural strait. It is also located entirely within Egyptian territory. It is fully subject to Egyptian sovereignty and jurisdiction, just like any other part of Egyptian land or inland waters. Image
Apr 7 • 24 tweets • 6 min read
1/x Today a small explanation about the "Worldscale Rate" (WS) as (oil) tankers have been in the news a lot the last month. A small đź§µ Image 2/x In the tanker market (crude oil, refined products, and other liquid bulk), voyage charters (also called spot charters) dominate. On a voyage charter, vessels are hired to carry cargo from a load port(s) to a discharge port(s) at an agreed freight rate.
Apr 4 • 25 tweets • 6 min read
1/x Imagine an oil tanker runs aground near your shores and the resultant oil spill creates around $22million in damages (in 1967) but because of a law, dating back to 1851, the ship owner liability is limited to $50. Image 2/x This was the case with the Torrey Canyon where the US Limitation of Liability Act of 1851 said"...the owner's liability shall not "exceed the amount or value of the interest of such owner in such vessel after the incident, and her freight then pending." Image
Apr 2 • 19 tweets • 7 min read
1/x In June 1967, during the Six-Day War between Israel and Egypt, Egyptian forces blocked the Suez Canal by sinking ships, laying mines, and filling it with debris to prevent Israeli use. A northbound convoy of 15 cargo vessels became trapped. Image 2/x Fourteen anchored in the wide Great Bitter Lake, while the American SS Observer was isolated in Lake Timsah. These ships from eight nations would remain stranded for eight years, coated in desert sand and known as the Yellow Fleet. Image
Apr 2 • 7 tweets • 3 min read
1/x I'm getting asked how I can see that the ship is supposed to be at anchor. The anchor chain is not immediately visible, but you can still see the ship is at anchor. How so? It's something called "Lights and Shapes" from the COLREG. A small đź§µabout shapes 2/x Back to our vessel. On the foremast you can see a black ball hanging. This is the ball mentioned in the COLREG - PART C-LIGHTS AND SHAPES - Rule 30 Image
Mar 31 • 20 tweets • 7 min read
1/x So a lot of people are talking about the "shipping route" in the Strait of Hormuz. What exactly are those shipping routes? On the charts, you can see a magenta-coloured area. This is a TSS or traffic separation scheme. A small đź§µ Image 2/x What is a TSS, and where do we find them? First, it should be said that TSS are only used in high-traffic areas. Elsewhere, the navigator is free to plan his route, taking into account fuel, time, weather, obstacles, hazards, etc.
Mar 30 • 15 tweets • 7 min read
1/x I have updated and translated an older thread on a fun little wartime project called: "PROJECT HABAKKUK." By late 1942, U-boats were causing significant damage to Allied merchant shipping in the North Atlantic. Image 2/x The allies were in a panic and sought desperate measures to protect those convoys. In desperation, Churchill conceived one far-fetched remedy, taking massive icebergs and smoothing them over to make landing strips in the North Atlantic to provide air cover for convoys. Image
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Mar 5 • 14 tweets • 6 min read
1/x So now I get the question: "So many Lloyds? Lloyd's of London, but I also hear about Lloyd's Register? Are they the same?" Well... no... but they share the same history. A little đź§µ 2/x We're back in Edward Lloyd's Coffee House on Lombard Street. In 1696, Lloyd launched "Lloyd's News," a thrice-weekly sheet on arrivals, departures, and wrecks. Underwriters bet fortunes on ships based on rumors so they crave reliable facts. Image
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