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24/08/2026

⚓ COA vs COB: Do you know the difference when it actually matters?

In commercial shipping, a small abbreviation can carry a big operational and financial consequence.

In this video, Captain Umang Thakkar breaks down COA (Contract of Affreightment) and the different contexts in which COB may appear, from Close of Business to Bunkers on Board or Cargo on Board.

You’ll learn:
🔹 What COA and COB mean in real shipping operations
🔹 Where these terms appear in charter parties and commercial discussions
🔹 How their meaning changes depending on context
🔹 Common interpretation mistakes maritime professionals should avoid

Whether you're a cadet, officer, shipowner, chartering professional or simply building your maritime knowledge, understanding commercial terminology is essential.

21/08/2026

One small slip on an accommodation ladder can turn into a serious accident. ⚠️⚓

Gangways are crossed every day, which is exactly why the risks are often underestimated.

Poor maintenance, incorrect rigging, missing safety nets or simple oversight can make a routine transfer dangerous.

In this breakdown, Capt. Dharmesh Shah explains why gangway safety should never become “just another checklist item.”

Good seamanship starts with the basics.

Have you ever faced an unsafe gangway situation onboard? Share your experience below.

19/08/2026

The Day the Suez Canal Was Blocked | Ever Given Incident Explained

⏳ March 23, 2021, 07:40 AM.
In less than a minute, one of the world’s largest container ships — the Ever Given — turned sideways in the Suez Canal, bringing global trade to a standstill.
🚢 For 6 long days:
⚓Over 400 ships were stuck in a traffic jam at sea
⚓Factories ran out of critical parts
⚓Oil prices spiked ⛽
Billions of dollars in trade losses mounted

19/08/2026

How do oil tankers measure cargo worth millions with such precision? 🚢🛢️

From trim and wedge calculations to VCF, ASTM tables and air buoyancy correction, tanker cargo calculation is where navigation, physics and commercial accuracy come together.

This isn’t just exam theory. These calculations directly impact cargo quantity, commercial value and operational accuracy onboard.

Whether you’re a maritime student, deck officer, engineer or simply curious about tanker operations, this one is worth saving. ⚓

17/08/2026

Master Speed, Time & Distance Calculations with Capt. Umang Thakar 🚢⚓

Speed, Time and Distance calculations are a core part of maritime navigation and an important topic for MMD exam preparation.

In this video, Capt. Umang breaks down the formulas, practical navigation examples and simple shortcuts that can help cadets and deck officers solve problems with greater accuracy and confidence.

📌 Learn:
• Speed-Time-Distance formulas
• Practical maritime examples
• Quick calculation methods
• Tips to avoid common errors

Watch, learn and strengthen your navigation fundamentals with NavInsider.

Celebrating the spirit of freedom, unity and the pride of being Indian. May we continue to move forward together with co...
15/08/2026

Celebrating the spirit of freedom, unity and the pride of being Indian.

May we continue to move forward together with courage, hope and responsibility.

Happy Independence Day from NavInsider.
Jai Hind!.

13/08/2026

Did you know a few barnacles can cost shipping companies millions? 🚢💸

Underneath every massive cargo ship lies a secret hidden below the waterline: Marine Fouling. Slime, algae, and barnacles attach to the hull and propeller, creating drag that can increase fuel consumption by up to 30%!

Watch how professional divers and underwater robots scrub the hull and polish propellers to mirror-like perfection keeping ships fast, fuel-efficient, and eco-friendly. 🌊✨

💡 Save money, reduce emissions, and save the planet all before leaving the port!

👇 What shocked you most about maritime maintenance? Drop a comment below!

10/08/2026

Ever wondered how a ship carries enough food for weeks or even months at sea? 🚢🥫

Step inside a real merchant vessel’s Provision Store with Capt. Nikhil and see how food is stored, tracked and managed onboard.

From inventory planning and hygiene standards to ensuring the crew has everything they need throughout a long voyage, provisioning is a serious part of keeping a vessel self-sufficient.

It’s not just about storing food. It’s about planning, discipline and crew well-being. ⚓

🎥 Full video on NavInsider youtube channel

07/08/2026

Inside a Ship’s Bridge | Merchant Navy Navigation Systems Explained

Step inside the command center of a merchant vessel and see how navigation is managed in real time. From radar monitoring to ECDIS route planning and AIS tracking, this video gives you a close look at how deck officers ensure safe passage at sea.

This is where decisions are made, routes are controlled, and safety begins.

Full video Link in the comments

05/08/2026

AIS 3.0 & VDES Explained | Maritime Safety & E-Navigation | Part 1

AIS (Automatic Identification System) is the backbone of modern maritime safety, navigation, and ship communication. But the original AIS performance standards (IMO MSC.74(69), adopted in 1998) are now outdated.

In this video, we explain everything you need to know about:
⚓ IMO MSC.74(69) — the original AIS performance standards
⚓ IMO MSC.570(109) — the revised standards, mandatory for new AIS installations after 1 January 2029
⚓ AIS 3.0 & VDES — the future of ship communication, integrating satellite connectivity, cybersecurity, e-navigation, and support for MASS (Maritime Autonomous Surface Ships)

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