Remote Inspections with Drones on Ships

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During 2019 and 2020, many Class Societies have developed guidelines for Remote Inspection Techniques (RIT) using Unmanned Vehicles as Drones and ROV, in order to assess the conditions of the ship and perform hull conditions surveys with reduced human exposure and lower cost.
IACS 42 (Guidelines for RIT), shows the details and recommendations for this type of survey, mainly focus on close-up surveys and gauging.
The drone inspection is definitely a way to save time and money and to enhance SURVEYORS safety, as many of the inspected areas are high risk and difficult to access safely. With SMART SURVEY system, our marine surveyors never have to risk their lives by climbing to high places or be exposed to hostile conditions to conduct surveys.
The maritime industry has the main focus on the capabilities of Unmanned Vehicles to access and navigate the survey areas. In 24marine we have managed to adapt our Vehicles to be able to confirm whether or not the structure contains defects, such as corrosion, pitting, cracking, buckling, or coating breakdown. In the video below, see our vehicles in actions:

Here a summary of benefits of RIT with drones:

  • Reduce risk for surveyors and inspectors, which are not exposed to the risks of working at height nor, necessarily to enter confined spaces.
  • A lot of time-saving during the inspection.
  • Great potential for enhanced quality evidence when assessing the condition of the spaces.
  • Reducing ship’s downtime and optimizing the preparation before the repairs.
  • Reduce the survey costs
  • Improve the efficiency of inspection techniques
  • Reduce the survey time (real-time streaming)
  • Set limits on conventional risk evaluation
  • Ensure a comprehensive risk assessment
  • Are easy to operate
  • Are environmentally friendly

Ultrasonic Hatch Test for Vessels

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Over 40% of all P&I claims are due to damaged cargo caused by water ingress via the hatch covers. This represents more than USD 40 millions of damaged cargo yearly.
The main cause of cargo damage is non-watertight hatch covers. Cargo damage due to water ingress from hatch covers remain an important part of insurance claims.
This is the reason; Insurers and Clubs require vessels to maintain hatch covers in a waterproof condition. It is also the statutory requirement for as in the International Convention on Load Lines, 1966.
There are different methods for testing hatch covers:

  • Ultrasonic Testing
  • Chalk test
  • Air test
  • Water hose test.

The Ultrasonic test is the only method that generate systematic and objective results, to determine if the hatch conditions are acceptable or not.

How to perform Ultrasonic hatch Testing

Using just a sound transmitter inside the cargo hold and a detector outside, 24 Marine can detect ultrasonic waves coming from the cargo hold. The hatch cover is closed, fully cleated, and battened. The operator then uses the hand-held detector to listen for the ultrasonic waves from the outside, picking up all sounds that pass through the sealing arrangements, vents or cracks.

Before starting the test, our SMART SURVEORS calibrates the receiver for Open Hatch Sound Value (OHV). Then when performing the test, it recommended to use the 10% benchmark.

  • If the sound levels are higher than 10% of the OHV, the seal is not acceptable.
  • If the sound levels received is less than 10%, the hatch covers are in a weathertight condition.

Virtual Reality on Marine Business

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Virtual Reality is a technology that is ready to be implemented in our daily lives. This Article concentrate on the use of VR in the maritime industry.

During the past few years’ VR has become more and more used in the construction and real estate industry and has a lot of potentials to become a great tool for Marine and Vessel surveying and management.

In 24 Marine we have few years implementing virtual reality as part of the survey package standards for Vessels, boats, Industrial, and cargo surveys.

During all this time we have received many comments and feedback from our customers and affiliates, which we are summarizing in this article.

Benefits of Virtual Reality for Maritime Industry:

  • Immersive visual experiences help streamline expectations for project delivery and clarity of the spaces inspected.
  • Potential boats buyers can get valuable insights into the various spaces, layouts, compartments, and equipment.
  • Vessels regulators (flag states, port controls, class societies, insurance companies, etc.) can have a truly clear view of spaces around the vessel, critical areas.
  • Incident investigations can benefit from VR to document in detail the area conditions and possible to identify causes and contributing factors.
  • Another great benefit of the VR model is to vessel and installation managers also can include metadata that contains the names and equipment details as well as operations and maintenance documentation. See an example here

See article from VR survey from the user perspective HERE

Why boats Sea Trials?

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Having a boat Sea trial for the first time should be an essential part of the process to buy a Boat and is the most practical test you can perform on your new boat. Buying a boat is very emotional and when the human act on emotions can forget the things that really matter.

When testing a new boat, always try:

  1. Create a real-life atmosphere on the boat, as close as possible to a typical day.
  2. Ensure to set targets for performance (RPM, speed, trim, roll, etc.)
  3. Play the different roles on board (driver, passenger, helper). Get the feeling!!!
  4. Try to replicate the future use (Sports, fishing, cursing, etc.)
  5. Bring the boat to max speed (30 Knots if possible), perform a hard turn, and test conditions in rough waters.
  6. At calm waters, center the wheel and note how well the boat keeps its straight line.
  7. Heading into and away from the sun, compare glare and reflections.

A test ride is not just a pleasure cruise, it is your best chance to see how the vessel responds, accommodates passengers, and fit to your needs as a potential owner.

Spend the time wisely and get the feeling as if you own the boat already.

24 Marine Smart Surveyors are available to assist you on get a full assessment of the boat you are planning to buy.

SMART SURVEYS 24 Marine Smart Marine Cargo Surveyor Panama Termografia Condition Valuation Rigging Surveys Termogrphy Smartsurvey Panama Canal Surveyors Damage Vessel Drawings Claims Condition Valuation Drones Bathimetry Investigation ADCP ROV RIT

ROV Hull Surveys

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There are many safety advantages that ROVs can provide over divers. This short article will point the advantages of ROVs over human divers:

Hull ROV Surveys
  • Ship hull inspections can be dangerous for divers because a port is a very dangerous place.
  • Currents can move diver to unsafe places during Inspections.
  • Rapid deployment
  • Less permits and safety considerations pre-launch
  • 24/7 operations without restrictions.
  • No restriction depth (within manufacture limits)
SMART SURVEYS 24 Marine Smart Marine Cargo Surveyor Panama Termografia Condition Valuation Rigging Surveys Termogrphy Smartsurvey Panama Canal Surveyors Damage Vessel Drawings Claims Condition Valuation Drones Bathimetry Investigation ADCP ROV RIT
SMART SURVEYS [email protected] 24 Marine Smart Marine Cargo Surveyor Panama Termografia Condition Valuation Rigging Surveys Termogrphy Smartsurvey Panama Canal Surveyors Damage Vessel Drawings Claims Condition Valuation Drones Bathimetry Investigation ADCP ROV RIT

Vessel Warranty Surveys

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A Vessel Warranty Surveyor provides independent third-party technical review and approval to any marine vehicle or structure, It is crucial to include surveyors from the planning stages through to the physical execution. 

You will get:

  • Independent and impartial advice.
  • Review, approval, and attendance for location surveys in accordance with regulations, standards, and best practices.
  • Condition and suitability surveys for a wide range of vessels. 

In this video wee surveyors conducting a Warranty survey on a Catamaran.

Boats Corrosion Surveys

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Most of us has been affected by corrosion our boats.

There are different  types of corrosion affecting our boats:

In simple words, Corrosion is the irreversible damage or destruction of a material due to a chemical or electrochemical reaction with the environment.

Metal Corrosion is Caused when it reacts with another substance such as oxygen, hydrogen, an electrical current, or even dirt and bacteria. Corrosion can also happen when metals like steel are placed under too much stress causing the material to crack

On boats are mainly three types of corrosion:

Galvanic Corrosion:
It is simply an electrochemical reaction between two or more different metals. The metals must be different because one must be more chemically active (or less stable) than the others for a reaction to take place. When we talk about galvanic corrosion, we’re talking about the electrical exchange. All metals have electrical potential because all atoms have electrons, which have an electrochemical charge. (see

Electrolytic Corrosion:
It is simply a process of accelerated corrosion. In this process, a metallic surface is continuously corroded by other metal it is in contact with, due to an electrolyte and the flow of an electrical current between the two metals, caused from an external source of electromotive force.

Ordinary Corrosion: 
Some times called rust, it is a chemical process which results in the formation of red or orange coating on the surface of metals, this reaction causes damage and disintegration of the metal starting from the portion of the metal exposed to the environment and spreading to the entire bulk of the metal.

ROV Operations by 1 Person

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ROV allows us to do quick and safe underwater surveys, easy deployment, portable and easy to transport:

When planning dives, please consider the following elements:

  • The mission objective.
  • Degree of accuracy required.
  • Current threat level.
  • On-scene conditions.
  • The amount of time plus resources available.

In this video, we will check how a single man underwater survey is carried out.

ROV operations by 1 person (

Current and Flowmeter Surveys

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24 marines team and equipment are ready to record currents and calculate water flows at your location.

By using balance impeller magnetized, producing a magnetic field when rotating which is passed through the cable user display. The unit is calibrated regularly at the factory.

By using electromechanical sensors, we can reduce the cost of flowmeter adquisition and calculations without comprimizing quality and precision.