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Why is it Important to Have a Clean Propeller?

The propeller’s surface area might be small compared to the hull of your ship, but a rough or unmaintained propeller can significantly affect the vessel’s fuel consumption. When the propeller spins, it produces thrust, which helps the ship move forward. During this time, it’s constantly exposed to several underwater attacks. Here’s everything you need to know about propeller cleaning and polishing.

What is Underwater Welding and Why is It Important?

One of the unique jobs of a commercial diver is performing underwater welding tasks to maintain ship’s seaworthiness. No matter the ocean’s conditions, these divers can get the job done! As the name suggests, underwater welding is welding underwater. But, if you know how to weld on land, it doesn’t mean you’d be great at underwater welding. From the method to importance, here’s everything you need to know about underwater welding.

Underwater Hull Cleanings – How Often and Why Should I Do It?

Imagine coasting on the blue waters with the fresh ocean breeze carrying a light salty mist providing the perfect relief from the gleaming sun. The Gulf of Thailand is an excellent avenue for exploration and relaxation as well as an important hub for merchant maritime activities and trade in the region.

No matter what kind of ocean-going vessel you choose, whether it’s for business or pleasure, all ships must conduct a pre-sailing check list prior departure. This type of list may include checking the ships rigging and hatches, estimating fuel requirements, watching the tides, loading safety equipment, etc., But first and foremost, you need to check your vessel’s seaworthiness – most notably your ship’s hull!

Everything You Need to Know About Underwater Ship Surveys

Continuous exposure to various marine elements, forces, and organisms causes a ship’s structural components to undergo wear and tear, which is why they require consistent preventive and scheduled repair. To observe and inspect whether the ship is ready to be operated, it’s important to carry out underwater surveys and timely repair work.

In this piece, we’re going to discuss what you need to know about underwater surveys. So, let’s dive right in, shall we?

Understanding Propeller Roughness: A Guide

It’s been observed that about six months out of dry-dock, the fuel efficiency of vessels begin to decrease. While there are several factors that may contribute to this, propeller roughness is one of the most significant factors.


As a vessel’s propeller spins and produces the thrust required to drive the ship forward, it is continually exposed to various attacks underwater. Such attacks include cavitation erosion, electrolytic action, biofouling (aquatic organisms attaching to the propeller), and more. This continuous exposure to attacks contributes to the propeller’s roughness, which only increases if not addressed. If maintenance is not carried out properly, that can also contribute to the propeller’s roughness.

A propeller that’s unmaintained and burdened with calcareous deposits and incrustations leads to several undesirable outcomes, including a possible shaft damage, diminished fuel efficiency, and lost thrust. The result of which includes more fuel costs, which impacts business competitiveness and profitability.

In this piece, we’re going to everything you need to know about propeller roughness. Take a look.

Propeller Roughness: Using the Rupert Scale

The globally accepted standard for propeller blade roughness is the Rupert scale. The Rupert ‘A’ grade roughly equates to a surface with a roughness of .65 microns, which is the highest quality finish achieved by reconditioning and polishing the vessel’s propeller blades.

Why Polished Propellers Provide More Power and Better Performance

As mentioned earlier, propeller roughness has a direct impact on the performance of the vessel and its fuel economy. Poorly maintained propellers can negatively impact the speed and power of a vessel by up to 5 percent. This is why a smooth, clean, and shiny propeller that’s properly maintained is critical to establishing optimal fuel efficiency.

Propellers should be polished frequently by a professional diving service provider who will perform the cleaning while the vessel remains afloat at anchorage or when berthed and loading cargo.

We are a leading underwater hull cleaning and biofouling removal services provider in Thailand. We also offer ship maintenance services, such as ship and boat hull cleanings, subsea welding, and propeller polishing.

Get in touch with our team for more information.

Hull Cleaning 101: What You Need to Know

All shipowners view their vessels with pride and admiration. There’s just something about how majestic it looks on the open waters. That said, while most boats may look stunning from up top, viewing them from under the waterline is a completely different story.

Complete Overview of Biofouling Management

The accumulation of aquatic organisms, such as animals, plants, and micro-organisms on structures and surfaces exposed to or submerged in an aquatic environment—typically ships’ hulls and ballast water—is known as biofouling. Biofouling can pose a significant risk to aquatic environments when invasive aquatic and marine species are moved from one ecosystem to another. While the Ballast Water Management (BWM) Convention does not mandate biofouling management because it is out of its scope, it’s important to understand the contribution and impact of biofouling on the transfer of invasive aquatic species.

In this piece, we’re going to provide an overview of what steps are being taken and what guidelines are in place to control and manage biofouling. Take a look.