Seaman Memories

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What is an LRIT or Long-Range Identification and Tracking?

Unlike conventional navigational tools onboard, LRIT operates with a unique functionality.  Ships equipped with Long-Range Identification and Tracking system can transmit their identification and location data via satellite. However, they cannot receive the same...

How Do Seafarers Use an Echo Sounder for Navigation?

Aside from being aware of what's happening on the sea surface, seafarers must also know if the water below is safe for navigation. That's where an echo sounder comes in. It is the only device on board that measures the depth of the water below the ship's keel in real time....

20 Automatic Radar Plotting Aid (ARPA) Functions You Must Know

An Automatic Radar Plotting Aid or ARPA is an essential tool for deck officers navigating the seas. It's a mariner's best friend for enhancing situational awareness and collision avoidance by automatically tracking and displaying the movements of target vessels. But this...

Seaman’s Notes

Mariner’s Handbook

What is a Gyro Compass? Parts, How it Works, Limitations

I still remember how I got deeply fascinated by the workings of a gyro compass on board. We were making a sharp alteration, and I pointed out that the compass card was spinning fast. Of course, it was not the compass card spinning but the whole vessel itself! The...

Marine Radar 101: An Essential Guide for Seafarers

For safe navigation and collision avoidance at sea, a solid understanding of marine radars is essential for every mariner, especially the Officers of the Watch (OOW). This equipment is undoubtedly one of our best navigational tools, but it’s only as good as its user....

13 Unexpected Points in the Magna Carta of Filipino Seafarers

The Magna Carta of Filipino Seafarers is now within reach as the Senate approves the Bill for a third and final reading. President Marcos recently stamped the bill "urgent", assuring the global community of the Philippines' commitment to meeting its obligations. But...

Critical Marine Navigational Tools & Their Functions Explained

As a mariner, having a solid grasp of navigational tools and instruments is a fundamental necessity! These equipment are the backbone of safe and efficient navigation at sea because, without them, our merchant ships can never set sail safely to any port. Whether...