The hottest Maritime Substack posts right now

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The Sea Geeks Are Ready for World War III

Common Sense with Bari Weiss • 737 implied HN points • 12 Mar 26
đź•ą Technology Maritime
  1. The oceans are turning into active battlefields, with ship attacks, underwater mines, and even submarine engagements becoming more common.
  2. The U.S. doesn’t have enough modern ships and the big defense contractors’ bureaucracy is making it hard to quickly rebuild maritime strength, despite political calls to restore dominance.
  3. A new wave of startups is building seaplanes, unmanned cargo aircraft, and underwater drones that can ferry supplies, do surveillance, and counter mines, offering fast, flexible alternatives to the traditional defense industry.

How to Reopen the Strait of Hormuz

Common Sense with Bari Weiss • 524 implied HN points • 13 Mar 26
🌍 World Politics Maritime
  1. Iran has effectively closed the Strait of Hormuz and declared that closure part of its official policy, blocking commercial traffic.
  2. The U.S. can reopen the strait by military force, but it would be risky, require a large, sustained naval effort, and likely take weeks before civilian shipping is safe.
  3. Historical operations show the U.S. has protected Gulf shipping and struck Iranian forces before, but the current campaign would be larger and more complex.

Yesterday’s War

Doomberg • 5706 implied HN points • 11 Dec 25
🌍 World Politics Maritime
  1. Attacks on tankers carrying Russian oil aim to cut Moscow’s war revenue, but they’re hard to enforce and provoke political and legal backlash from other countries.
  2. The strikes and sanctions have already driven up war‑risk insurance and shipping costs sharply, raising logistics bills for everyone and likely pushing global commodity prices higher.
  3. Fully blocking seaborne exports probably won’t crush Russia because producers can offset lost volume with higher prices and alternate routes, meaning the economic pain may fall on global consumers rather than on Moscow.

Reading List 07/19/25

Construction Physics • 5845 implied HN points • 19 Jul 25
đź•ą Technology Maritime
  1. Chinese shipbuilding has a rich history, but finding complete histories is tough. There are a few good books that piece together the growth of the industry over the years.
  2. Air quality varies a lot across the globe, with cities in India and Pakistan often ranking among the worst. Smaller cities in Hawaii tend to have much better air quality.
  3. Installing solar panels on cargo ships is an exciting new idea that could make shipping greener. A recent ship successfully uses solar power to help run its systems, showing the potential for renewable energy in maritime transport.

LEAKED: Keir Starmer’s Memos Responding to Trump’s Request for Help Opening the Strait of Hormuz

I Might Be Wrong • 6 implied HN points • 18 Mar 26
🌍 World Politics Maritime
  1. European leaders largely rebuffed President Trump’s request for help reopening the Strait of Hormuz.
  2. There’s a clear rift between President Trump and UK Prime Minister Keir Starmer, with Trump publicly singling him out for criticism.
  3. Leaked drafts show Starmer personally wrote and revised multiple memos in response, and only the final version was officially transmitted with timestamps documenting the edits.
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Balsa Update: Springtime in DC

Don't Worry About the Vase • 1971 implied HN points • 08 Jul 25
🇺🇸 U.S. Politics Maritime
  1. A new proposal could limit U.S. exports by requiring a certain percentage to be on U.S.-built ships, which currently don't exist in enough numbers. This could drastically reduce export volumes.
  2. Only a few voices were raised against this proposal, as many industries have adapted to a system where shipbuilding is not prioritized in the U.S. This led to a lack of awareness about the negative impact of the new rules.
  3. Balsa Research decided to take action after realizing the importance of the issue. They submitted comments and presented their findings, which contributed to changes in the proposed export restrictions.

Beijing appears to warn it could intercept Evergreen ships transporting HIMARS to Taiwan, in war or peace.

Pekingnology • 150 implied HN points • 02 Jan 26
🌍 World Politics Maritime
  1. China signaled it might intercept and seize civilian cargo ships carrying HIMARS or other military supplies, and presented such actions as lawful both in wartime and peacetime.
  2. The warning was unusually specific and was pushed through multiple official channels — coast guard and PLA posters, state media, and a foreign affairs account — making the scenario explicitly highlighted.
  3. Because that specific message may not have registered widely outside Chinese-language outlets, there is an information gap that could increase the risk of miscalculation if an interception happens.

The Problem of Longitude and Social Coordination

SP-AND-EX • 33 implied HN points • 27 Jan 26
đź’ľ History Maritime
  1. Portable chronometers solved the longitude problem and turned ocean navigation from guesswork into precise, repeatable global mapping, massively accelerating trade and exploration.
  2. Large-scale civilization depends on shared measurement and coordination systems—like common timekeeping, language, and record-keeping—and improvements in those systems can dramatically boost social and economic coordination.
  3. Crypto and distributed ledgers are presented as a planet-scale method for inscribing state and value tied to time, but the big question is whether they represent a true paradigm shift or merely an incremental improvement.

Nelson in the Arctic. Polar bears, geese, and filled breeches.

The Common Reader • 744 implied HN points • 29 Nov 24
đź’ľ History Maritime
  1. Young Nelson went to the Arctic at just 15 years old, which was unusual for boys his age. His strong desire and connections helped him join the expedition.
  2. The journey was filled with challenges, like navigating thick fog and ice that could crush their ships. Weather changed constantly, making it tough to travel.
  3. Despite the harsh conditions and dangers, the crew encountered wildlife and gathered supplies. They had to work hard and cooperate to survive in the icy environment.

Titanic Connections

backstory • 242 implied HN points • 24 Jun 23
đź’ľ History Maritime
  1. The Titanic connections led to various interesting stories and events
  2. The town of St. John's is deeply rooted in maritime history beyond just the Titanic
  3. The enduring fascination with the Titanic stems from the multitude of unique stories and incidents related to the tragedy

Space At Sea

Ill-Defined Space • 19 implied HN points • 06 Dec 24
đź•ą Technology Maritime
  1. Space technology is becoming more useful in everyday life, even on cruises. People can now get reliable internet access on ships through Starlink, making it easy to stay connected.
  2. A system called AIS helps ships know where they are and avoid collisions. It sends out information about the ship's location and heading, which anyone with internet access can view on sites like MarineTraffic.
  3. Using space services like GPS and satellite internet makes life easier and safer for everyone, whether they're working at sea or enjoying a vacation on a cruise.

VOL 66: Titanic Sub Crash: Humans Enduring Pursuit of Exploration

MAP's Tech Newsletter. • 19 implied HN points • 23 Jun 23
đź’ľ History Maritime
  1. The pursuit of exploration is deeply ingrained in human nature, as shown throughout history by daring explorers like Ferdinand Magellan and David Livingstone.
  2. Accidents are a reality in risky pursuits like deep-sea exploration, but these incidents do not deter human interest in exploring the unknown.
  3. Despite the risks, the drive for exploration and discovery persists as a fundamental aspect of humanity, exemplified by individuals like Hillary and Norgay conquering Mount Everest.

The Spice Must Flow: The Dutch-Portuguese War-Part 1

Of All Trades • 10 implied HN points • 20 Jan 24
đź’ľ History Maritime
  1. The Dutch-Portuguese War lasted nearly 70 years and involved major powers like Spain, England, France, China, and kingdoms in South Asia.
  2. The conflict represented a clash between capitalism and mercantilism, with the Dutch East India Company fighting for shareholder value.
  3. The war reshaped maritime legal policy, led to the development of Mare Liberum, and catalyzed the rise of capitalism as a dominant global force.

Daily Exasperation #13

Exasperated Infrastructures • 4 implied HN points • 21 Aug 23
🏝 Travel Maritime
  1. The author loves Seattle and wants to help improve transportation and make the city safe and equitable.
  2. Mount Rainier adds a magnificent touch to daily life in Seattle, a feature absent in East Coast cities.
  3. Seattle's collaborative transportation system, although efficient, still struggles with coordination between different agencies.