Maritime law comes down to two options: in rem and in personum. In rem means suing the ship itself no matter who owns it. In personum means going after the actual person or company behind the ship. A ship under maritime law almost counts as its own legal person separate from whoever holds the title. That split decides who get paid first when something goes wrong at sea and it trips up a lot of people who never expected to need this information.
A shipment stuck over someone else’s debt
Imagine Farah a small business owner, sends a large clothing order to Dubai on a cargo ship. A few weeks later, the ship is stopped at the port. Farah did nothing wrong. The problem is that the shipping company still owes money to a fuel supplier from an earlier trip.
Under maritime law that unpaid debt can sometimes lead to the ship being arrested, along with the cargo on board. So Farah’s goods can get stuck even though she has nothing to do with the debt.
This is where in rem and in personam actions come in. One action is against the ship or property, while the other is against the person or company responsible for the debt. Understanding the difference is important for anyone shipping goods by sea.
Suing the ship, not the owner
In rem in a Latin term that means “against the thing”. In maritime law, it allows someone to bring a claim against the ship itself rather than directly against its owner. The law treats the vessel as the property connected to the claim. A court can arrest the ship, keep it in a port and in some cases sell it to pay the debt. This can happen even if the owner lives in another country or is difficult to reach.
That is how Farah’s cargo can get stuck even though she had nothing to do with the debt. The claim is tied to the ship not to Farah personally.
In personum works differently. Here the claim is brought against the actual person or company responsible for the problem. For example if a shipping company breaks a contract the other party can sue the company and ask the court to order it to pay. The ship is not the target of that claim.
Sometimes both action can exist at the same time. A claimant might pursue the company personally while also making a claim against the ship. They are two different legal routes and understanding that difference makes maritime law much easier to follow.
In simple terms in rem targets the property while in personum targets the person or company. An in rem claim can be useful when the ship in available but the owner is overseas or difficult to reach. An in personum claim makes sense when the responsible person or company is known and can be brought before the court.
Why maritime law treats ships almost like people
Ship owners once lived far away from the ports where their ships operated. Before phones, email and digital shipping records finding the owner of a vessel could take weeks or even months. Maritime courts needed a practical way to deal with that problem so the law allowed the ship itself to stand in for its owner.
If a dockworker was injured, a supplier was left unpaid or cargo was damaged, the person bringing the claim did not always have to track down the owner first. They could take action against the ship while it was still sitting in port. That gave courts something they could actually reach even when the owner was thousands of miles away.
India’s Supreme Court relied on this principle in the 1993 case M.V. Elisabeth recognizing the power of Indian courts to arrest foreign vessels involved in maritime disputes. What started as a practical solution to an old problem still plays an important role in maritime law today.
Does in rem still hold up today
It still does, courts use this rule today. In maritime cases, a court can arrest a ship over unpaid debts, damage claims or unpaid crew wages. The rule did not disappear just because it is now easier to find ship owners.
Ships still enter ports in countries where their owners have no real presence or property. Going after the ship itself can be the quickest way to bring the dispute before a court. That is why in rem jurisdiction remains a practical and active part of maritime law.
Why some people online obsess over maritime law
Some people online claim that maritime law secretly controls everyday life, including birth certificates, traffic tickets and bank accounts. They point to things like gold-fringed flags or supposed contracts created at birth as proof.
These claims have no legal basis. Maritime law deals with ships, cargo, ports and disputes connected to the sea. It has nothing to do with birth certificates or ordinary traffic cases. Courts have repeatedly rejected these arguments.
The confusion may come from terms like in rem, which can sound strange at first. Suing a ship instead of its owner seems unusual but there is a clear legal reason behind the rule.
Maritime law isn’t the same as the law of the sea
People mix these two all the time. Maritime law covers private fights between ships, owner, cargo holders and crew. The law of the sea is bigger which includes, where one country’s water end, fishing rights, how nations divide up ocean space.
For a full breakdown of how the two differ read Law of the Sea vs Maritime Law: Differences on our website.
What this means if you ship goods or own a boat
Check who actually owns the ship carrying your goods not just the company you booked with. A ship can sometimes be arrested because of an unpaid maritime debt, even if your own contract says nothing about that debt.
The rule can also work in your favor. If your cargo arrives damaged or a shipping company breaks its agreement you might be able to make a claim against the ship or the company.
In rem means taking legal action against the ship. In personam means taking legal action against the person or company.
Maritime law has both options because ships travel between countries and their owners are not always easy to reach. Knowing which option fits your case can make a big difference in how quickly you recover your money.
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