Our Blog
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List of Medical Facilities & Practitioners Enrolled in MISMO 2026
As we all know, one of the requirements for processing our COP application in MISMO is a valid medical certificate in PEME format. Many seafarers often asked me if MARINA would approve the clinics they opted for. We’re about to answer that here. The good thing is we now have a list of the accredited…
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↪️ Rate of Turn Indicator (ROTI): Meaning, SOLAS Rules, and Formula for Use
The Rate of Turn Indicator (ROTI) is a critical navigational instrument used to monitor a ship’s turning motion in real-time. It displays the rate at which a vessel is turning to port (red) or starboard (green), measured in degrees per minute. This tool enhances situational awareness, especially during channeling, tight maneuvers, and low visibility conditions.…
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🚢 How Ship Officers Use the Marine Autopilot System for Safe and Efficient Navigation
The marine autopilot system is one of the most reliable and time-saving navigational tools in the bridge. Designed to maintain a vessel’s course without constant helm input, it significantly reduces fatigue for bridge watchkeepers, especially during long sea passages. For many able seamen (ABs) and bridge officers, the autopilot, also called automatic steering or auto-steering,…
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🧭 How Does a Magnetic Compass Work on Metal Ships?
At first glance, it seems contradictory- using a magnetic compass on a ship made of metal. After all, magnets attract iron, and ships are massive steel structures. Yet, every seagoing vessel, from tankers to fishing boats, still relies on a magnetic compass as a vital navigational tool. So, how does this instrument remain accurate despite…
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🛰️ What is NavTex? Purpose, Frequencies, and How It Works
NavTex (Navigational Telex) is an international automated broadcast system that transmits Maritime Safety Information (MSI) such as navigational warnings, weather forecasts, and SAR alerts directly to ships. It operates as part of the GMDSS (Global Maritime Distress and Safety System) using dedicated medium and high frequencies (518 kHz, 490 kHz, 4209.5 kHz) and reaches up…
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🚨 Components of GMDSS: A Seafarer’s Guide to Maritime Distress Systems
The Global Maritime Distress and Safety System (GMDSS) is an international safety framework that enables ships in distress to instantly send emergency alerts to nearby vessels and coastal rescue stations using both satellite and terrestrial communication systems. Introduced by the IMO and enforced under SOLAS Chapter IV, GMDSS replaced manual Morse code communication with automated…
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24 Seafarer Tips for Job Hunting, Life On Board, Signing Off, & Vacation
These seafarer tips I’m about to show you may be a little old-school or overly simple by today’s standards. But they work and have greatly helped my career since I started sailing in 2009. Over the years, I refined them and saved which ones are working and timeless and which aren’t. I’m sharing them with…
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🌐 ECDIS: Your Ultimate Guide to Modern Marine Navigation
The Electronic Chart Display and Information System (ECDIS) has revolutionized maritime navigation by replacing bulky paper charts with a dynamic, computer-based system. Endorsed by IMO and mandated by SOLAS, ECDIS is now standard equipment aboard merchant vessels. Once met with skepticism, ECDIS has become a critical tool for deck officers, offering real-time navigation, improved safety,…
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🧭 Gyro Compass on Ships: Definition, Parts, Working Principle & Common Limitations
A gyro compass is a shipboard navigational instrument that finds true north by using the principles of gyroscopic inertia and the Earth’s rotation, rather than relying on the Earth’s magnetic field like magnetic compasses. It’s widely used aboard merchant ships, naval vessels, and offshore platforms because of its accuracy and integration with other navigation systems…
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📟 Marine Radar 101: How Ship Radars Work, Types, and Best Practices
For every Officer of the Watch (OOW) and bridge team member, mastering marine radar isn’t optional, it’s essential. Whether you’re navigating crowded traffic lanes or low-visibility conditions, radar is one of the most critical electronic aids to ensure situational awareness, collision avoidance, and safe navigation. But like every tool onboard, a radar system is only…