For the crew, maintaining useful AIS information is an ongoing operational responsibility. It includes recognising which details need human attention, which arrive from connected equipment and which changes require authorised technical support. The following approach helps organise that work without treating AIS as a substitute for a proper navigational watch.

Start with the information your vessel sends

The IMO overview of AIS explains that the system automatically exchanges identity, position, movement and other safety-related information. Begin by becoming familiar with the own-ship information pages on the installed equipment. Knowing where to find a field is a different skill from knowing whether its contents are correct.

Arrange familiarisation around the actual equipment rather than a generic checklist alone. Ask the officer being familiarised to locate the relevant information and explain where it comes from. Uncertainty about a menu or abbreviation is easier to resolve during a quiet preparation period than during a busy arrival.

Give each type of data a responsible owner

IMO’s operational guidelines, resolution A.1106(29), distinguish static, dynamic and voyage-related information. Identity and installation details differ from sensor-fed movement information and voyage entries. Navigational status requires operator attention. The guidelines also explain that an AIS built-in integrity test does not validate the accuracy of incoming sensor data.

Translate those distinctions into a clear onboard responsibility. A watchkeeper should know which routine entries they are authorised to update, which discrepancies must be reported to the master, and which settings belong with an authorised technician. A field being editable does not mean that changing it is the correct response to an unexplained discrepancy.

Make voyage changes visible

A departure delay, revised destination or changed loading condition can leave an earlier entry behind. Include the relevant AIS review in the vessel’s existing departure and voyage-change processes. Avoid creating another isolated form that competes with the information already used by the bridge team.

A useful practical question is: “What changed, and where else does that change need to be reflected?” If the answer is uncertain, assign someone to resolve it. The aim is to keep the operational picture consistent, while following the equipment instructions and the vessel’s approved procedures for the actual entries.

Treat installation changes as a reason to review

Transport Canada’s AIS safety bulletin describes inaccurate information associated with incorrectly set antenna reference points, manual input errors and sensor configuration. Its regulatory discussion is Canadian; it should not be presented as a universal rule for vessels operating in the Gulf. The technical examples nevertheless illustrate why installation details deserve attention.

When equipment has been replaced or a relevant arrangement altered, include the affected AIS information in the service close-out discussion. Ask which settings were reviewed and how the result was verified. Keep the report available to the officers who will use the equipment, particularly when maintenance and departure happen close together.

Investigate discrepancies without guessing

Suppose an officer notices that own-ship information does not agree with another bridge indication. Record the specific fields, the time and the conditions of observation. Distinguish what was seen from the suspected explanation. Avoid changing several settings at once in an attempt to make the displays agree.

Similar-looking fields may describe different things, and the equipment documentation matters. Escalate unresolved differences through the onboard process. A service engineer benefits more from a precise account of the discrepancy than from a broad statement that the AIS is unreliable. Preserve relevant evidence before it becomes difficult to reconstruct.

Be cautious about information received from others

IMO’s operational guidance cautions that AIS does not provide a complete traffic picture and should not be the sole source for navigational decisions. Accurate information from your own installation cannot guarantee accurate information from another vessel. Continue to use the required lookout, radar and other available information within the applicable collision-prevention framework.

Commercial vessel-tracking websites should not be treated as the authority for an immediate onboard diagnosis. Their displayed information may involve collection and presentation processes outside the bridge team’s control. When investigating what the installation is transmitting, agree an appropriate verification method with the responsible technical personnel rather than relying on a public screenshot alone.

Close the loop before the next watch

After an authorised correction or service visit, ensure the next officer understands what changed and whether anything remains unresolved. A brief entry connecting the original discrepancy with the action and verification is more useful than an unexplained “checked OK.” Keep the supporting report with the equipment’s maintenance records.

For assistance, send the vessel name, IMO number, AIS make and model, a clear description of the discrepancy and the intended port call. Offshore Marine Solutions can help coordinate radio and navigation equipment service. Reliable AIS information starts with careful ownership of the details: someone checks them, someone resolves uncertainty, and the outcome reaches the people standing the next watch.

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This article offers a practical way to recognise and report questionable position data. It does not replace the installed equipment manual, the vessel’s safety management procedures or applicable flag requirements. Different radios present position sources, timestamps and warnings differently, so familiarity with the actual installation is essential.

Look at the receiving equipment

The US Coast Guard’s explanation of DSC describes its role in initiating distress and other calls and stresses the importance of connecting position information to the radio. For the watchkeeper, the practical implication is straightforward: a working position display elsewhere on the bridge is not, by itself, evidence that the radio is receiving that information.

Identify where the radio shows its position input and associated status. Use the manufacturer’s instructions to understand whether the displayed coordinates came from an external receiver, an integrated receiver or a manual entry. If that distinction cannot be established confidently, raise the question during equipment familiarisation rather than waiting for a fault.

Separate missing information from old information

A blank position field is an obvious reason to investigate. Coordinates that look reasonable can be harder to question. Ask what demonstrates that they are current: the relevant time indication, source status and any warnings described in the manual. A location that was correct earlier may no longer describe the vessel’s situation.

Use the vessel’s established position-verification arrangements when checking plausibility. Do not infer freshness only from the last few digits changing, or assume that an unchanged position is wrong when the ship is alongside. The useful comparison includes the vessel’s circumstances and the equipment’s explanation of its displayed data.

Record what the display actually says

“GPS not working” is often too broad a fault description. A clearer report identifies the radio, the displayed warning, the coordinates and time shown, and the time of observation. Record whether the information was absent, apparently frozen or inconsistent with the bridge’s verified position. Keep observations separate from a proposed cause.

For example, a hypothetical report might state: “VHF No. 2 displayed the previous berth position after departure; a position-input warning was visible; the master was informed.” This gives a technician a useful starting point without asserting that a particular receiver, cable or interface has failed. Include photographs of the display only when permitted by onboard information-handling arrangements.

Acknowledge the warning without losing the problem

Silencing an audible warning can make the bridge quieter, but it does not demonstrate that the underlying condition has cleared. Follow the manual and onboard procedures for alarm acknowledgement, and keep the unresolved condition visible in the appropriate defect record. The next officer needs to know what still requires attention.

When the indication returns to normal, record that change accurately. Avoid closing an intermittent fault solely because it disappeared during one observation. The responsible officers and service personnel should be able to distinguish a verified repair from a symptom that is temporarily absent.

Use approved fallback arrangements

If automatic position input is unavailable, consult the installed radio’s instructions and the vessel’s approved procedures for any permitted manual input and updating arrangements. Do not assume one updating interval applies to every installation or flag. The responsible officer should establish what is required for that vessel and who will maintain the information.

Write down the responsibility and the next review point so the arrangement survives a watch change. An informal statement that somebody will update the radio later leaves a gap precisely where continuity is needed. Any operational limitation should be assessed by the master through the vessel’s established process.

Do not turn a position check into a distress transmission

Do not send a distress alert to find out whether position data is present. Keep routine display checks separate from authorised radio tests. The Coast Guard’s DSC safety notices highlight the consequences of alerts lacking identification or location; their US-specific test arrangements should not be assumed to apply in Saudi or Gulf waters.

Any test should follow the equipment instructions and applicable operational arrangements. A successful voice exchange does not answer every question about the digital installation. If the evidence needed to close a fault is unclear, agree the verification method with a qualified service provider before carrying out work.

Prepare a useful service enquiry

Provide the radio make and model, equipment identifier, observed warning, relevant timestamps and recent maintenance history. Explain whether the problem affects one radio or several, without treating that pattern as proof of a shared cause. Include the vessel’s next port, expected attendance window and a responsible onboard contact.

After work is completed, request a report that identifies the investigated symptom, the action taken, the verification performed and any outstanding limitation. Offshore Marine Solutions can coordinate marine radio equipment service. Accurate observations before attendance help the service team investigate efficiently and help the crew understand what has actually been resolved.

The post DSC Position Inputs: Recognising Missing or Stale Data appeared first on Offshore Marine Solutions.

The Global Maritime Distress and Safety System combines satellite and terrestrial communication systems, as described by the International Maritime Organization. That wider system depends on people understanding the condition of their particular installation. The practical handover suggestions below should be used within the vessel’s approved procedures, applicable flag requirements and equipment instructions.

Start with what changed during the watch

Instead of beginning with a general statement that everything is satisfactory, identify changes since the previous handover. Was an alarm received? Did a display reset? Was a maintenance visit completed? Is the bridge waiting for a response from shore support? A brief, specific account is more useful than repeating the entire equipment inventory.

For each change, separate the observation from the explanation. “The terminal restarted twice” is an observation. “The power supply is defective” is a diagnosis that may not yet be established. Recording assumptions as facts can send the next officer or service engineer in the wrong direction. If the cause is uncertain, say so.

Give every open fault an identity

“Radio problem” is too broad to support a reliable handover. Identify the equipment, its location, the symptom and the time it occurred. Include an equipment reference or serial number where that helps distinguish similar units. If the fault is intermittent, note the conditions reported when it appeared, without attempting to reproduce it through an unauthorised test.

A practical open-item entry can contain five elements: the observation, any operational limitation, the person informed, the action already taken and the next action owner. This is an organisational aid, not a substitute for the radio log or planned maintenance system. Cross-reference the formal record so different lists do not drift apart.

Hand over limitations as well as equipment status

An item marked “awaiting repair” tells the incoming officer less than it should. The important question is what that condition means for the watch. Has the master been informed? Are there approved arrangements or restrictions that the incoming officer needs to understand? Is a specialist attendance planned at the next port?

The handover should not become an informal authorisation to continue with impaired equipment. Decisions about operational consequences belong with the responsible onboard management and applicable procedures. Where the permitted arrangement is unclear, the uncertainty should be escalated rather than passed from watch to watch as an accepted condition.

Keep the radio log and supporting records connected

As a flag-specific example, the UK Maritime and Coastguard Agency’s MGN 641 Amendment 1 recommends radio-log entries covering equipment checks, significant radio traffic and operators going on and off watch. Its guidance is for the stated UK application; vessels under other flags should confirm their own requirements.

In practice, the incoming officer should be able to locate the relevant record without searching several folders or messaging applications. Keep fault reports, maintenance references and technician recommendations identifiable. If a paper note is used temporarily, establish where the information will be transferred and who is responsible for that transfer.

Do not let a service visit close an issue automatically

A technician’s departure does not, by itself, demonstrate that every reported issue has been resolved. Read the service report for the specific equipment and symptoms involved. A visit may have completed one task while leaving a spare part, further investigation or another attendance outstanding.

At handover, distinguish completed work from recommendations. If the report describes a limitation, ensure that the relevant officers know about it. Where terminology is unclear, seek clarification from the service provider rather than converting an ambiguous statement into a reassuring summary. Clear close-out evidence is especially valuable when several contractors have worked on related systems.

Use a short conversation to confirm understanding

A handover form can support the exchange, but it cannot establish that the incoming officer understands the most important point. Ask them to identify the open issue requiring attention during the next watch and where its supporting information is recorded. This allows misunderstanding to surface while both officers are present.

Consider a hypothetical case: a terminal has returned to normal after an unexplained restart, and shore support has requested the alarm history. A useful handover explains that the fault remains open, identifies the requested information and names the person following up. Simply saying that the terminal now works would conceal the unfinished action.

Make recurring issues visible to the wider team

When the same symptom appears repeatedly, individual watch entries can make it seem like a series of isolated events. Link related observations in the defect-management process. A clear history helps the master, superintendent and service engineer assess what has already been investigated and what remains uncertain.

For a service enquiry, send the vessel name, IMO number, equipment make and model, observed symptoms, relevant report references and the intended port call. Offshore Marine Solutions can help coordinate radio equipment service and radio survey attendance. A well-prepared enquiry starts with the same discipline as a good handover: accurate observations, clear responsibilities and a visible next step.

The post A GMDSS Watch Handover That Leaves No Unresolved Faults appeared first on Offshore Marine Solutions.

Essential Navigation Equipment

Every vessel today depends on equipment such as:

• Radar for collision avoidance.

• ECDIS (Electronic Chart Display and Information System) for digital navigation.

• AIS (Automatic Identification System) for ship-to-ship awareness.

• GPS & Gyrocompass for precise positioning.

Without regular servicing and calibration, these systems can fail when needed most.

Importance of GMDSS Surveys

All SOLAS vessels must undergo annual GMDSS radio surveys. Offshore Marine Solutions’s certified engineers conduct:

• VHF, MF/HF, and satellite communication tests.

• EPIRB & SART inspections.

• Complete certification according to IMO and flag state requirements.

Preventing Costly Downtime

A failed radar or VHF system can lead to port state detentions, delays, and financial losses. Offshore Marine Solutions provides spare parts, on-site repairs, and authorized servicing for top brands like Furuno, JRC, and Icom.

Offshore Marine Solutions’s Dedicated Service Stations

With our navigation & communication workshop and stock area, we provide immediate response, system upgrades, and long-term service agreements.

Conclusion
Modern shipping demands reliable navigation and communication systems. Offshore Marine Solutions ensures your vessel’s equipment is always operational, certified, and compliant — helping you sail with confidence.

The post Why Navigation & Communication Systems Are Critical for Modern Shipping appeared first on Offshore Marine Solutions.

NAVTEX receivers broadcast Maritime Safety Information, while SARTs help rescuers locate liferafts. Both are mandatory under SOLAS but often neglected during maintenance.

Common Failures

• Old NAVTEX units with faulty printers or displays.
• SARTs with expired batteries.
• Lack of crew familiarity with testing procedures.

Inspection Checklist

• Verify NAVTEX is receiving current broadcasts.
• Test SART transmission and verify LED function.
• Check battery expiry and replace before due date.

Our Services

We provide testing, service, and certification of NAVTEX and SART units across Saudi ports. Schedule a survey now to avoid PSC delays.

The post Why NAVTEX & SART Units Are Often Overlooked During Surveys appeared first on Offshore Marine Solutions.

The Automatic Identification System (AIS) and Emergency Position Indicating Radio Beacon (EPIRB) are critical for safety and collision avoidance. PSC inspectors focus heavily on both.

AIS Inspections

• Verify MMSI, IMO number, and call sign are correctly programmed.
• Check GPS input and display integrity.
• Ensure power supply and backup batteries function.

EPIRB Inspections

• Check battery expiry date.
• Test transmission and strobe light.
• Verify registration with local maritime authority.

How We Assist

Our technicians conduct AIS & EPIRB inspections with immediate certification, minimizing PSC delays. Book an inspection today.

The post AIS & EPIRB Inspections: How to Stay Compliant at Port Calls appeared first on Offshore Marine Solutions.

GMDSS equipment ensures vessels can communicate in emergencies. Annual surveys are mandatory, but many vessels fail Port State Control (PSC) checks due to small oversights.

Top 5 Common Issues

1. Expired EPIRB batteries.
2. Non-functional SART units.
3. Outdated NAVTEX receivers.
4. Handheld VHFs with dead batteries.
5. Missing or outdated radio logbook entries.

How to Stay Compliant

• Keep spare batteries for handheld VHFs.
• Test EPIRBs and SARTs regularly.
• Update NAVTEX software when required.
• Maintain detailed radio logs for all DSC calls.

Our Support

We carry out flag and class-approved GMDSS surveys with full reporting and certification. Arrange your survey now to avoid PSC detentions.

The post GMDSS Surveys: Common Issues Found During PSC in the Gulf appeared first on Offshore Marine Solutions.

The Voyage Data Recorder (VDR) and Simplified VDR (S-VDR) capture navigation and communication data. SOLAS requires an Annual Performance Test (APT) to ensure recordings are valid for accident investigation.

What Inspectors Check

• Power supply and battery backup
• Sensor connections (speed log, gyro, GPS)
• Bridge audio and VHF inputs
• Data storage and playback
• Float-free capsule condition

Preparation Tips

• Check last APT certificate is onboard.
• Verify float-free EPIRB battery dates.
• Ensure no cables are disconnected during bridge repairs.

Our Service

We perform class-approved VDR/S-VDR APT across Saudi Arabia and Gulf ports. Certificates are issued immediately for PSC and class compliance. Book your APT today.

The post VDR & S-VDR Annual Performance Test (APT): Step-by-Step Guide appeared first on Offshore Marine Solutions.

In the dynamic realm of maritime safety, where every voyage carries inherent risks, Voyage Data Recorder (VDR) systems stand as silent sentinels, capturing critical data to enhance accident investigation, improve safety measures, and prevent future incidents. These sophisticated systems come in various types, each meticulously engineered to withstand the rigors of marine environments and provide comprehensive data recording capabilities. Let’s embark on a journey to explore the diverse array of VDR system types and understand why they are indispensable assets above vessels navigating the world’s waterways.

1. Simplified Voyage Data Recorder (S-VDR):

The Simplified Voyage Data Recorder (S-VDR) is a compact and cost-effective version of the traditional VDR system, designed to meet international regulations for vessels not required to carry a full VDR. S-VDR systems record essential data such as vessel position, speed, heading, engine parameters, and communication audio recordings, providing valuable insights for accident investigation and analysis. S-VDRs are mandatory for certain classes of vessels, including cargo ships over 3,000 gross tonnage and passenger ships carrying more than 12 passengers.

2. Full Voyage Data Recorder (F-VDR):

The Full Voyage Data Recorder (F-VDR) represents the standard version of VDR systems, offering comprehensive data recording capabilities and advanced features for enhanced safety and compliance. F-VDR systems record a wide range of data, including vessel position, speed, course, engine performance, sensor readings, radar images, and bridge audio communications, providing a detailed record of vessel operations before, during, and after an incident. F-VDRs are mandatory for certain categories of vessels, including passenger ships, tankers, and high-speed craft.

3. Fixed VDR (F-VDR):

Fixed VDRs are permanently installed onboard vessels and integrated into the vessel’s bridge or control room, providing continuous monitoring and recording of essential data during normal operations and emergency situations. These systems are designed to withstand harsh marine conditions, including shock, vibration, humidity, and extreme temperatures, ensuring reliable performance in all environments. Fixed VDRs are essential for vessels required to comply with international regulations governing the installation and operation of VDR systems.

4. Float-Free VDR (FF-VDR):

Float-Free VDRs are specialized systems designed to deploy automatically and float to the surface in the event of a vessel sinking or submersion, ensuring that critical data recordings are preserved and accessible for accident investigation and analysis. These systems are equipped with buoyant capsules containing VDR components, which are released from the vessel upon immersion in water and float to the surface, where they emit distress signals and facilitate recovery by search and rescue authorities. Float-Free VDRs are mandatory for certain classes of vessels, including passenger ships and cargo vessels over 20,000 gross tonnage.

Importance Above Vessels:

The importance of VDR systems above vessels cannot be overstated, as they serve as invaluable tools for enhancing maritime safety, accident investigation, and regulatory compliance. By capturing and storing critical data about vessel operations, VDR systems enable authorities to reconstruct incidents, identify contributing factors, and implement corrective measures to prevent future accidents. Moreover, VDR data can be used to improve navigation practices, optimize vessel performance, and enhance crew training and competency. As such, VDR systems play a pivotal role in ensuring the integrity, reliability, and resilience of maritime operations in an ever-evolving maritime landscape.

In conclusion, VDR systems are indispensable assets above vessels navigating the world’s waterways, providing essential data recording capabilities to enhance safety, compliance, and accident investigation. Whether it’s S-VDRs, F-VDRs, Fixed VDRs, or Float-Free VDRs, each type of VDR system contributes to the safety, efficiency, and sustainability of maritime operations, underscoring their crucial importance in the modern maritime industry.

The post Navigating Safety: Unveiling VDR Systems Types and Their Crucial Role Above Vessels appeared first on Offshore Marine Solutions.