EMERGENCY COMMUNICATIONS
Emergency Communications
By Rob Murray on SV AVANT
Cruisers spend big dollars on emergency communications, and in most cases never use them. What are some of the options, their pros and cons, and use cases aboard?
EPIRB
EPIRBs (Emergency Position Indicating Radio Beacon(s)) are the gold standard in reliability and durability. Designed by an international consortium of search and rescue agencies in the 1980s, these use the SARSAT (Search And Rescue Satellite Aided Tracking) system of satellites (a combination of government operated LEOSAR, GEOSAR, and MEOSAR satellites) combined with a network of 29 MCCs (Mission Control Centers) which communicate with national RCCs (Rescue Coordination Centers).
When you activate your EPIRB, a SARSAT satellite will pick up the signal within minutes and relay it to the MCC nearest the satellite via their Local User Terminal. The MCC will relay the transmission to the national authority’s RCC you have registered your EPIRB with (typically your flag country). Then ‘your’ RCC will relay the information to the RCC responsible for the area you are in and reach out to the emergency contacts registered with your beacon, and the RCC local to your location will begin a rescue operation. This is typically done in less than an hour.
COSPAS-SARSAT System Overview
The downside of EPIRBs is they are one-way communicators – they simply relay your call for help, and do not indicate if it’s a fire, sinking, or medical emergency.
Once purchased, EPIRBs are free to operate (no subscription fee), and the only ongoing cost is periodic replacement of the batteries (depends on unit specifications). Most units are water activated, so they should be stored where rain or spray won’t set them off inadvertently. They are specified to operate for a minimum of 48 hours, but typically will operate for much longer.
EPIRBs must have the battery replaced after use, they are good for a single activation per battery.
PLB
PLBs (Personal Locator Beacon(s)) are basically EPIRBs in short pants. Smaller and lighter than EPIRBs, they are typically less expensive as well. The broadcast at the same power as EPIRBs (5.0 watts) but have half the battery life (24 hours minimum vs 48 hours with an EPIRB). As with EPIRBs, they will typically operate much longer than the minimum specified.
Similar to EPIRBs, they must be registered with a national authority and have no operating cost beyond periodic battery replacement.
PLBs, like EPIRBs must have the battery replaced after use, they are good for a single activation per battery.
SEND
SENDs (Satellite Emergency Notification Device(s)) are devices like the InReach, InReach Mini, Garmin InReach Messenger, Zoleo, Spot, Spot X, Yellowbrick, ACR Bivy Stick, Motorola Defy Satellite Link and so on.
These use various commercial satellites or commercial satellite constellations and allow emergency ‘send help’ communications, typically with a dedicated SOS button. They also typically allow two-way communications, like a text or SMS on your phone (some allow this in a self-contained method, some require tethering with a smartphone or tablet). Most operate on the Iridium Satellite Network, which is generally considered to be of the highest quality and offers global coverage. Some use other networks like Globalstar, which does not offer global coverage. They typically operate at about 1.5 watts of transmit power.
Most use the IERCC (International Emergency Response Coordination Center) as their emergency response partner ( WWW.IERCC.COM ). Spot uses Overwatch Rescue ( WWW.OVERWATCHXRESCUE.COM ).
When you press ‘SOS’ on the device, it sends a message via the satellite or satellite constellation to the emergency response partner and they act in a way like the EPIRB response mechanism above, but they call/text you back (if your device allows) as well as calling your emergency contacts.
If the device allows you to send and receive messages you can also initiate a two-way conversation with a shoreside contact for a serious but not life-threatening situation, such as an engine or medical problem.
Most SENDs also support the sending of ‘breadcrumb’ trails while cruising. This is useful to allow shoreside contacts to follow you and leaves a record of your journey should you ‘go dark’ in an emergency that incapacitates you and your crew such that you are unable to activate any of your devices, giving search and rescue teams a starting place to look for you.
Each of these devices, being commercial, requires a subscription. Costs vary.
SENDs are rechargeable and can be used again and again. Battery life varies between units.
There is a good comparative review of many units at ( https://www.treelinereview.com/gearreviews/best-personal-locator-beacons )
DSC Distress Calls
Marine radios (VHF and MF/SSB) can send a DSC (Digital Selective Calling) alert, usually by pressing a red button on the radio. The button usually must be held down for more than 3 seconds to activate it (this to limit the chance of false alerts). This sends a GPS position if your radio contains or is connected to a GPS, plus your MMSI (Marine Mobile Service Identity).
VHF is monitored for these alerts worldwide (withing coverage limits), but coverage via MF/SSB is spotty. (There are propagation issues, and some rescue authorities no longer monitor the frequency. The USCG stopped monitoring the 2182Hz rescue frequency in 2013.)
VHF DSC alerts will be picked up by other vessels within radio range.
This is cost-free.
How do you contact Search and Rescue directly wherever you are?
Each country has SEARCH AND RESCUE NUMBERS. These can be found on the Ocean Posse website for each area we operate in:
https://oceanposse.com/aruba/#emergencies
https://oceanposse.com/azores/#emergencies
https://oceanposse.com/bahamas/#emergencies
etc
https://oceanposse.com/italy/#emergencies
https://oceanposse.com/mexico/#emergencies
Ocean Posse members can substitute the country you are in to get to the right numbers
What about Cell Phone Satellite Communications?
Some newer cell phones from Apple or Google/Pixel have limited SOS satellite connectivity, and Samsung has announced forthcoming satellite capability. Somewhat klugey, they require manual alignment of the device and use the GlobalStar network. Not all devices have the feature, and some are limited by the carrier. The geographic coverage is quite limited. These should be considered back-ups until the technology becomes more mature.
What should you do to get ready for an emergency?
Select and install your chosen devices and set them up appropriately.
For EPIRBs and PLBs, that means registering them with the appropriate national authorities and mounting their storage brackets in suitable locations. Each device has a testing schedule and protocol, so add reminders to your calendar to ensure you keep up with the schedule.
For SEND devices, ensure you have the appropriate subscription in place and the emergency contacts are registered, and the appropriate contacts are in the device’s address book or contact list. If the device tethers with a smart phone or other device, ensure the appropriate software is installed and up to date, and the tethering connection(s) have been tested. Having the tethering connection enabled on multiple devices adds redundancy. Most send devices get firmware updates from the manufacturer, so find out how your device updates and schedule a check every 90 days or so to ensure you’re up to date. Ensure you have a charging/battery replacement protocol in place so that the device is always charged up or, if it has replaceable batteries, you have spares on hand.
For DSC Alerts, make sure your radio(s) have your MMSI programmed in and have access to a reliable GPS signal, and that the radio(s) have a first-class antenna connection (testing with an SWR meter is the best way to ensure this).
Once the hardware and software are established, train your crew in the use of these devices and make sure they know how and when to use them. Preparing a ‘Cheat Sheet’ of simple instructions that can be posted in a handy spot ensures they are not falling back on memory in an emergency.
You have an emergency, what should you do?
If you are faced with a life-threatening situation or there is an imminent threat of danger such as loss of life, potential loss of life, loss of the vessel, potential loss of the vessel, sinking, fire, loss of the rig, or other serious emergency you should activate all of your emergency communications all at once. If you have all three, use the EPIRB, SEND and DSC alert all at the same time.
- The EPIRB will get SAR resources mobilized rapidly on a nation-to-nation basis. It is hands down the most reliable distress signaling mechanism.
- The SEND will typically allow two-way communication on the nature of the emergency and what aid is required.
- The VHF DSC Alert will summon any nearby vessels to your aid.
If you are faced with a potential life-threatening situation or there is the potential for an imminent threat of danger to develop, you should initiate a two-way communication with a shoreside contact to seek advice and/or advise them of the situation (ideally with one of the emergency contacts for your EPIRB or SEND). This could be via any means available, Cell Phone, Starlink (email, teleconference, etc.), SEND, or whatever works. Nearby vessels should be alerted via a normal VHF radio call. This allows them to be aware of what’s going on and be ready to scale up response appropriately as the situation demands.
Posse Perk
Ocean Posse members have access to additional help from other Posse members who may be nearby and from Posse HQ. Members can send a message on the Posse line Ap to reach out for nearby vessels. The Posse Team has assisted in rescue coordination and has connections in many regions with search and rescue and other resources to assist if required. Contact Dietmar at dietmar@oceanposse.com or text him at ( +1 (702) 861-9823 ) to set the team in motion!
MANTA RAYS MAJESTIC & MYSTERIOUS
MANTA RAYS : Majestic and Mysterious
Manta Rays are among the most majestic gentle giants in tropical and sub tropical oceans of the world. Seeing them swim under water is a magical sight to behold; with their mouths wide open, manta rays silently move through the water in a slow, effortless, gliding motion, feeding on the smallest of living creatures, plankton, that drift in the ocean currents. Like many species of sharks, mantas are in constant motion to keep water flowing over their gills to breathe. Additionally, mantas are cartilaginous fish meaning their skeleton is made of cartilage like our ears and noses.
There are two species of Manta Rays: the Reef Manta (Mobula alfredi) and the Oceanic Manta (Mobula birostris). No matter the species of manta, With their wings outstretched they dwarf all but large sharks or whales. The reef mantas wings span up to 5 meters while the oceanic mantas wings span up to 7 meters and can weigh up to 2 tons. Manta Rays have the largest brain to body ratio of all living fish and are known to display high levels of intelligence, have long-term memory, and are able to map their environment using sights and smells. The markings on their underside are their unique 'fingerprint'. Much like the marking on the underside of a humpbacks tail, the star-like pattern of whale sharks, and the whisker spots of lions, there are no two exactly alike and these creatures can be identified by their markings that make them unique.
As seen in this photo above there is a mutualism, or mutually beneficial relationship, between mantas and various small hitchhiker fish like remoras. The Remora clings onto the Manta Ray for protection, transportation and scraps from the Manta Rays meals. The Remora benefits the Manta Ray by cleaning it’s skin of bacteria and parasites keeping Mantas healthy. Manta Rays can also be found at 'Cleaning Stations' (or healthy coral patches) sometimes circling close by for up to an hour before moving in for a cleaning and then staying on for hours getting cleaned. In this case the mantas have a symbiotic relationship with cleaner fish (like the cleaner wrasse fish and the scarlet cleaner shrimp). These small fish and crustaceans swim around the larger animals and inside their mouths to eat the parasites, bacteria, and dead skin cells from their bodies. One animal is getting fed while the other is getting cleaned. It's a win-win! Manta Rays will often return to cleaning stations they 'know'.
Manta rays live up to 50 years. The female manta becomes sexually mature a bit later than the male: round 8-10 years of age. Manta rays are ovoviviparous meaning that after fertilization the offspring grows inside an egg (like a bird...but WAIT...there's more)...which the female manta carries inside of her during the pregnancy and give birth to a live fully independent manta ray (live birth like a mammal?!). Mantas give birth to 1-2 manta every 2-5 years. Many details are still a mystery as no one has ever documented seeing a live birth in the wild.
Perhaps because of their size, their grace, their omnipresence in the oceans Manta Rays, and many other characteristics, manta rays have found their way into the art and mythology of many cultures around the world. In Polynesian mythology, for instance, the manta ray is believed to be the guardian of the ocean and a symbol of knowledge and wisdom. In ancient Greek mythology, they were believed to be messengers of the sea god, Poseidon. In ancient Hindu mythology, manta rays are believed to be the manifestation of Lord Vishnu, the creator of the universe. In Japan, manta rays are often associated with the god of the sea, believed to protect sailors and fishermen from danger and provide them good fortune. Interestingly, they are universally seen as protectors and not aggressors, creators not destroyers.
Sadly, as much as manta rays are widely admired to revered their existence is threatened in various ways. Being pelagic, they cross 'borders' constantly and live in a warming ocean that is thereby struggling with habitat loss and teaming with industrialized fishing techniques that do not take care to avoid them (mantas are often 'bycatch' and can die due to suffocation as a result of entanglement.). In some places mantas are specifically sought out for food and bait (for instance in the Sea of Cortez, Mexico) and in the western south Pacific mantas are harvested for their gill plates that are used in Asian Medicine. It is worth noting that in Indonesia, Peru, and the Philippines there now national laws in place to protect manta rays.
Still, in order to protect animals, we need to understand them. Efforts are being made to understand manta distribution, mating, and ecology better to help them. However, Scientific efforts to understand Mantas formally began rather recently around 2008.
According to Mantatrust.org :
Manta rays often undertake seasonal migrations, travelling tens, hundreds, and sometimes thousands of kilometers. This means that their habitat can encompass large areas, sometimes crossing national boundaries, where conservation management is often more challenging. Therefore, to effectively protect these animals, we must first understand what habitats they are using, when they are there, and what they are doing within it.
....It is often a sad fact of human nature that the more endangered a wild animal becomes, the greater our desire to possess or consume it. Diminishing stocks drive a lucrative trade (often illegal) to hunt down, trade in, and consume the dwindling populations of these endangered species.
Interestingly, again there is still so much mystery around mantas that citizen scientists are helping with these efforts. People can communicate directly with the scientists at Manta Trust to help supply information (pictures) to create a 'mantabase' about specific manta individuals to share where they are and begin to help map their health, habitats, and seasonal routes.
If you are a mariner, look out for this incredible species of fish. Maybe you can appreciate their majesty while unlocking some of their mystery.