Shearwater Recalls Diving Transmitters Due to Drowning Hazard

What was recalled

If you are a scuba diver who relies on Shearwater equipment to monitor your air supply, it is crucial to understand exactly which gear has been pulled from the market. On February 21, 2019, the U.S. Consumer Product Safety Commission (CPSC) announced a significant recall involving specific yellow pressure diving transmitters manufactured by Shearwater Research. These devices are not merely accessories; they are vital safety instruments that provide real-time tank pressure readings for scuba divers, allowing them to track their remaining air supply during underwater excursions. The decision to issue this recall stems from a critical design or manufacturing flaw that compromises the reliability of these units under specific conditions.

The affected products are distinctly identifiable by their physical characteristics and labeling. You need to look for a transmitter that is bright yellow in color with a cylindrical shape. These units measure precisely 3 inches in length. On one end of the device, you will find the text "FCC ID: MH8A" printed clearly. This identifier is a key marker for verifying if your specific unit falls under this recall notice. The packaging is equally important for identification. The cardboard box that originally held the transmitter should display either part number 13009 or part number 13009-01. Additionally, an eight-digit serial number will be etched on the side of the transmitter itself, and it will begin with either the letters "FK" or "BM". If your device matches these physical and numerical descriptions, it is part of this specific recall lot.

The scope of this recall was established to address a potential failure mode that could occur during active use. While the CPSC record does not provide an exhaustive breakdown of every single unit sold globally, it confirms that Shearwater Research initiated this remedy to ensure diver safety. The company identified that the transmitters could fail to signal tank pressure correctly when two such transmitters are used simultaneously in the same dive. This interference issue means that a diver might receive inaccurate or no pressure readings at all, which is a dangerous situation underwater. Although the firm has only received one official report of communication loss using the transmitter during a dive, the potential for catastrophic error with dual-transmitter setups was sufficient to warrant a broad recall. Consumers who purchased these yellow Shearwater transmitters are urged to check their equipment against the specific model numbers and serial prefixes detailed above to determine if their gear is included in this safety action.

The hazard, explained

Scuba diving is an activity that relies heavily on trust in equipment, particularly when it comes to monitoring your air supply. Underwater, the ability to see and hear clearly is limited by the environment itself, so divers depend on their instruments to provide accurate, real-time data about their safety margins. The Shearwater pressure transmitters involved in this recall are designed to serve as one part of that critical communication loop, translating the physical pressure inside your tank into a digital reading that you can monitor at a glance. However, the specific hazard identified by the Consumer Product Safety Commission (CPSC) centers on a phenomenon known as signal interference when two such transmitters are used simultaneously during a single dive.

To understand why this is dangerous, it helps to look at how these devices typically operate. In many technical diving scenarios, divers may carry redundant equipment for safety. This might include using a primary computer with an integrated transmitter and carrying a secondary, standalone transmitter on their tank valve as a backup. The recall notes that the yellow Shearwater transmitters can fail to signal the tank pressure accurately due to electromagnetic interference when two units are active in close proximity. Essentially, the radio frequencies emitted by one transmitter can disrupt or "jam" the signal from the other. This does not mean the devices break physically; rather, the data stream becomes corrupted, delayed, or completely lost.

The consequence of this technical failure is immediate and severe for a diver. If the transmitter fails to communicate correctly, the diver’s computer may display stale data, no data at all, or erratic readings. In the context of scuba diving, air supply management is paramount. A diver who believes they have ample air remaining because their gauge appears normal might actually be running low on oxygen if the signal has been compromised. This creates a scenario where a diver could unknowingly consume their air supply faster than anticipated, leading to an emergency ascent or, in worst-case scenarios, drowning.

The CPSC reports that Shearwater Research has received one confirmed incident involving the loss of communication using these transmitters during a dive. While the agency emphasizes that there have been no reported injuries or deaths linked to this specific defect, the potential for harm is significant. The danger lies not in an explosion or a sharp edge, but in the silent, subtle failure of information. Underwater, you cannot simply check your phone or look at a wall clock; you rely entirely on the electronic feedback loop between your gear and your body. When that loop is broken by interference, the diver is left without a critical safety net.

This type of hazard is particularly insidious because it can occur without any obvious warning signs until it is too late. Unlike a mechanical failure where you might hear a click or see a crack, signal interference is invisible and silent. It requires a level of technical understanding to diagnose why a gauge is behaving strangely, which may not be possible while managing buoyancy, navigation, and the stress of being underwater. Therefore, the CPSC’s recommendation to stop using these units immediately is a precautionary measure designed to eliminate the risk before it can manifest in an emergency situation.

Who is most at risk

The primary group affected by this Shearwater recall consists of recreational and technical scuba divers who rely on their equipment to monitor underwater breathing gas levels. Specifically, the individuals at highest risk are those who engage in "doubles" or multi-tank diving configurations. In these scenarios, divers carry two independent air tanks to extend their bottom time or provide safety redundancy. The hazard described in this recall is not related to general equipment failure but is specific to a complex interaction: the potential for radio frequency interference when two of these yellow cylindrical transmitters are used simultaneously on the same dive. Therefore, the risk profile is targeted directly at divers who actively use dual-transmitter setups rather than those using a single-tank configuration.

While scuba diving is generally pursued by adults with significant training and physical fitness, the nature of this specific hazard creates a unique vulnerability for experienced divers who may feel a false sense of security. When a diver relies on two transmitters, they are often further from the surface or in more complex environments than typical shore dives. If the interference causes one transmitter to fail to signal tank pressure, the diver loses critical situational awareness regarding their remaining air supply. This is particularly dangerous because the failure is silent and invisible until it is too late. The victim is not necessarily an inexperienced novice; rather, it is any diver who trusts the electronic readout of their gauge without realizing that the signal integrity has been compromised by the proximity of a second unit.

In the context of drowning hazards underwater, there are no demographic groups such as children or the elderly who are disproportionately affected in the traditional sense. Instead, the "risk" is defined by dependency on technology. Divers who have become overly reliant on digital readouts to manage their decompression obligations and air consumption rates are most vulnerable. If a diver ignores manual backup procedures—such as checking physical gauges or relying on their dive buddy’s signals—they face a catastrophic risk of running out of air without warning. The one reported incident of lost communication during a dive underscores that this is not a theoretical problem but a practical danger that has already impacted real users in the water.

Furthermore, divers who operate in deep water or overhead environments (such as caves or wrecks) are at an elevated level of risk because they have less margin for error. In these settings, a sudden loss of pressure information can lead to rapid ascent decisions that increase the risk of decompression sickness or arterial gas embolism. Thus, the most at-risk population includes technical divers and those who frequent challenging dive sites where electronic monitoring is their primary method of tracking life-support resources.

• Divers using two Shearwater transmitters simultaneously on a single dive.
• Technical divers relying on digital pressure readings for complex decompression planning.
• Any individual who has not yet stopped use of the affected yellow transmitter models.

How to tell if you have the recalled item

If you are a scuba diver who uses Shearwater equipment, taking a moment to inspect your gear is the most important step you can take right now. The specific items involved in this recall are not all Shearwater transmitters, but rather a particular subset of their yellow pressure diving transmitters. Because these devices look quite distinct from other models, identifying whether yours is included requires checking three specific physical characteristics: the color, the shape, and the printed markings on both the device itself and its original packaging.

First, look at the transmitter’s appearance. The recalled units are distinctly yellow with a cylindrical shape. They measure exactly 3 inches in length. If your transmitter is a different color or a different shape, it is likely not part of this specific recall, though you should still verify the markings to be absolutely certain. The physical description is straightforward: a bright yellow cylinder that fits comfortably in your hand and mounts easily to your wrist or console.

The most reliable way to confirm if your device is affected is by checking the printed text on the end of the transmitter itself. You need to look for the Federal Communications Commission identifier, which should read "FCC ID: MH8A". This marking is printed directly on the end cap of the unit. If you do not see this specific FCC ID, your device is not part of this recall.

In addition to the device itself, you should check the cardboard packaging if you still have it handy. On the box, look for either Part number 13009 or 13009-01. Alongside the part number, there will be an 8-digit serial number etched on the side of the transmitter itself. These serial numbers always start with either "FK" or "BM". If you have the original box, it may also list these details clearly.

If you cannot find your packaging, rely on the etching on the side of the transmitter for the serial number prefix and the printed FCC ID on the end. This recall was announced on February 21, 2019, so if you purchased a Shearwater yellow diving transmitter before or after this date, it is still potentially subject to this issue if it matches the physical description above. When in doubt, the safest approach is to compare your device against these specific identifiers: the yellow cylindrical body, the 3-inch length, the "FCC ID: MH8A" on the end, and any packaging or serial numbers starting with FK or BM.

What to do — step by step

Your refund, repair, or replacement options

If you own one of the recalled Shearwater diving transmitters, the good news is that the manufacturer has established a clear and accessible path to resolve the issue at no cost to you. Shearwater Research has committed to providing a free repair or exchange for the affected units. This remedy is designed to remove the hazard entirely from your diving kit without placing any financial burden on the consumer. It is important to understand that this is not merely a suggestion; it is the official corrective action mandated by the recall process to ensure your safety underwater.

The first and most critical step in accessing this remedy is to stop using the transmitter immediately. Do not take the device on your next dive, nor should you use it for any training or recreational purposes until it has been serviced. The risk of signal interference between two transmitters during a single dive is serious enough that continued use poses a direct drowning hazard. By halting usage now, you are protecting yourself and your dive partners from potential communication failures when monitoring tank pressure becomes essential.

To initiate the repair or exchange process, you will need to contact Shearwater Research directly. The company has set up specific channels for consumers to reach their support team. You can call their toll-free number at 888-875-9745. It is helpful to know their operating hours: they are available from 9 a.m. to 5 p.m. Pacific Time, Monday through Friday. If you prefer written communication or need to send documentation, you may also email them at info@shearwater.com. For those who prefer navigating the company’s digital resources first, you can visit their website at www.shearwater.com and click on the "Community" section for additional information regarding the recall.

When you contact Shearwater, be prepared to provide specific details about your device to verify that it is indeed part of this recall lot. You will need to have your unit’s serial number ready, which is etched on the side of the transmitter and typically starts with either "FK" or "BM." Additionally, if you still have the original cardboard packaging, the part numbers 13009 or 13009-01 are printed there. Having this information on hand will help the support team process your request for a free repair or exchange more efficiently.

The "why" behind this remedy is straightforward: the issue stems from signal interference when two transmitters are used simultaneously, not necessarily a fundamental manufacturing defect that affects every unit individually in all contexts. However, because the failure can occur unpredictably during a dive, the safest course of action is to have the firm address the hardware directly. Whether they choose to repair the existing transmitter or exchange it for a new one, the goal is to ensure that your diving equipment functions reliably and safely. Do not attempt to fix this yourself; only authorized service through Shearwater Research will void the warranty concerns and ensure the safety standards are met.

Please act promptly. While there is no strict deadline mentioned in the recall facts for completing the repair, delaying contact means you are continuing to carry a potential risk in your gear. By reaching out during their business hours or sending an email, you are taking control of the situation and ensuring that your diving experience remains safe and enjoyable for years to come.

What can happen if you ignore it

When you choose to keep using a piece of safety equipment that is known to be faulty, you are essentially gambling with your most vital resource underwater: air. The Shearwater diving transmitters recalled in February 2019 were designed to provide a critical link between your tank and your monitoring system. When that link fails due to signal interference while using two transmitters on the same dive, the consequence is not merely an inconvenience; it is a potentially life-threatening loss of situational awareness. Ignoring this defect means proceeding into the water with a false sense of security, relying on data that may suddenly and silently vanish.

The primary risk here is drowning, a hazard that arises from the specific nature of how these transmitters can fail. The recall notes that interference can cause the transmitter to stop signaling tank pressure. In a normal dive, you are constantly monitoring your air supply to ensure you have enough gas to ascend safely and complete any necessary safety stops. If the transmitter fails to report this data, you might believe you are deep in your reserve when, in reality, you could be empty or critically low. This disconnect between what you see on your gauge and what is actually happening in your tank can lead to poor decision-making at depth. You might push past your planned limits, unaware that your air supply has already run out.

We know this is not just a theoretical possibility. The manufacturer has already received one confirmed report of communication loss during an active dive. While the specific outcome of that single incident was not detailed in the public recall notice, any loss of critical telemetry data underwater is a serious event that requires immediate corrective action by the diver. By ignoring the recall, you are exposing yourself to the same scenario. In the complex environment of scuba diving, where stress levels rise and cognitive function can degrade as air runs low, relying on a broken gauge is exceptionally dangerous. You lose the ability to plan your ascent with confidence.

Furthermore, continuing to use these devices undermines the redundancy that divers often seek when using multiple pieces of equipment. If you are using two transmitters expecting one to back up the other, and both are susceptible to the same interference issue, you have not gained safety; you have created a single point of failure that is harder to detect. The silence of the gauge can be deceptive. It does not always beep or flash when it fails; sometimes it simply stops updating, leaving you with stale, incorrect information. In an emergency situation where every second counts, acting on false data can lead to panic, rapid ascent, or other decompression injuries. The cost of ignoring this recall is far greater than the effort required to send the device in for repair.

Ultimately, the decision to ignore a safety recall shifts the burden of risk entirely onto you. Manufacturers and regulatory agencies identify these flaws through rigorous testing and incident reports precisely because they understand the severe consequences of failure in high-stakes environments like diving. By continuing to use the yellow Shearwater transmitters with FCC ID MH8A after this date, you are disregarding established safety boundaries. The remedy offered—a free repair or exchange—is designed to restore the reliability that was lost. To ignore it is to accept an unnecessary and preventable risk of drowning or severe injury due to air depletion.

Staying safe: broader tips

While this specific recall addresses a technical interference issue with certain Shearwater transmitters, the underlying lesson applies to any critical safety device you rely on for your well-being, whether you are diving deep or simply walking through your home. The most effective way to stay safe is to treat your equipment not just as tools, but as vital links in a chain of protection that requires regular maintenance and awareness. For instance, just as divers must ensure their transmitters communicate clearly with their gauges, homeowners should recognize that smoke detectors and carbon monoxide alarms have expiration dates. These devices do not last forever; the sensors degrade over time, leading to false negatives when you need them most. Establishing a habit of testing these alarms monthly and replacing batteries or entire units according to the manufacturer’s timeline can prevent tragedies that often stem from simple neglect rather than product defects.

Beyond routine maintenance, staying informed is your strongest defense against unforeseen hazards. Many people do not realize that safety recalls are issued frequently across a wide range of products, from children’s toys to automotive parts and home appliances. To stay ahead of potential risks, consider subscribing to email alerts from the Consumer Product Safety Commission (CPSC) or checking their website regularly. This proactive approach ensures you are aware of new dangers as soon as they are identified, allowing you to take action before an incident occurs. It is also wise to register your purchases with manufacturers immediately after buying them. Registration often serves as a direct line of communication for safety notices and makes it significantly easier to locate model numbers and serial keys if a recall does occur.

Finally, always prioritize the principle of redundancy in high-risk activities. In diving, relying on a single piece of electronic equipment is inherently risky because technology can fail due to battery issues, water damage, or interference. The same logic applies to other areas of life where safety is paramount. For example, when traveling with young children, use multiple layers of protection, such as car seats that are properly installed and age-appropriate, rather than relying solely on one feature. By cultivating a mindset of double-checking equipment, staying updated on safety news, and understanding the limitations of any single device, you create a robust personal safety net. This general vigilance complements specific recall actions and empowers you to make informed decisions that protect you and your loved ones in everyday life.