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If a VHF Radio Transmits And Nobody Hears It …

July 25, 2018 By EJ Vongher

A recent U.S. Coast Guard rescue operation here in southeastern Connecticut in which a distress call on the VHF radio resulted in a good Samaritan mariner recovering four passengers from a capsized vessel is a great reminder of the importance of a functioning marine radio.

The quick story:  a boat in distress put out a call to the USCG on the VHF, which was being monitored by a good Samaritan who responded to the sinking boat and took the endangered crew aboard his boat until the Coasties arrived. The linchpin in this great story:  a functioning VHF radio.

For many mariners – especially weekend boaters or casual fisherman who don’t use their vessel every day – the VHF Radio is infrequently used; you’d be surprised at the number of boats we encounter without one atRayMarine VHF Radio Image all. If you do have a VHF, it’s only a benefit if it’s operating correctly. Which leads to the topic of this post:  how can you determine whether your VHF radio is functioning as intended. Here are some tests you can conduct yourself.

Transmission Tests

What is the best way to make sure you have a functioning VHF? Test it. There are a variety of ways to determine whether it’s transmitting.

  • The first is to make an on-the-air radio check by asking for confirmation of message received from another boat or shore station that is a reasonable distance away. When doing this, you should avoid using Channel 16, which is for hailing purposes only.
  • If this isn’t possible, switch your radio to low power (1 watt) and monitor yourself on a handheld VHF. You’ll probably need to turn the volume down and keep the handheld away from your boats primary radio and antenna to minimize proximity feedback squeal. Another option in this method is to have a crew member take your portable down the dock for an on-the-air radio test.
  • A third transmission test is to watch your boat’s amp meter when depressing the radio microphone transmit button. When transmitting on high power (25 watts), you should see about 4 to 5 amps registered on the meter; on low power is should be close to 1 amp.


Reception Check
In most communications scenarios, the key to success is a two-way exchange of information. It is no different with Marine VHF radios. No matter how well your radio is transmitting, if you can’t hear a station transmitting back you don’t have communications. Here are two tests to check your radio’s “hearing ability.”

Local Weather Test – Use a local weather channel to verify that you are hearing the broadcast clearly and without distortion. If you can, switch to a weaker, more distant weather channel to test your radio receiver’s ability to hear weaker signals. For further reception diagnostics, remove the antenna cable connector from the back of your radio while monitoring local weather. Then insert the tip of a small screwdriver or paper clip into the center contact of the radio’s antenna jack. If you can still hear the weather broadcast, your radio most likely has good reception.

Sea Tow Automated Radio Checks – Sea Tow operates a network of automated radio-check stations in many parts of the country as a public service. You can check your VHF radio by calling the station in your area. When you transmit on its channel, you will hear a recorded response and then hear a playback of your voice verifying that your radio is transmitting, modulating and receiving. Check the Sea Tow website to if this service is offered in your area and on which channel it operates.

Shakespeare Radio-Check Meter
Finally, if you require more consistent feedback on your VHF radios transmission and reception performance, install a Shakespeare Radio-Check Meter. Their ART-3 Antenna Radio Tester is a palm-sized monitor that easily connects between your radio and antenna. It will give you a readout on your radio’s power output, the health of your antenna and cable, and evaluate your reception as well. It can also be permanently mounted next to your radio to provide a radio check every time you transmit. What’s more, Shakespeare also has a very nice video on trouble-shooting radio and antenna problems. 

Pro Tip
A common error is miss-setting the channel mode. VHF radios operate on three different channel groups: U.S., Canada or International. An incorrect channel-mode setting might result in the inability to communicate on some channels. An icon on your radio’s screen indicates which mode your radio is operating on.

If you have any questions about the health of your VHF radio, or any other Marine Electronics or Electrical issues, please contact us for a complimentary consultation. [Read more…]

Filed Under: Boat Maintenance, Boating Safety, Marine Electronics

The Season Never Ends for Electronics Upgrades

September 30, 2017 By EJ Vongher

As we go from yard to yard, we see sailors, power boaters, and anglers all enjoying this wonderful early-Autumn Sailing Camden MaineAutumn weather. Thoughts of end-of-season decommissioning are definitely being tabled; replaced by decisions about proper SPF level and sunset sail locations.

However, we will soon see preparations being made for boat removal and seasonal decommissioning. This time of year is also great for taking stock of your boat’s electronics system and making notes on possible maintenance and upgrades which might enhance the enjoyment and utility you get from your vessel. If this is of interest, there are a couple articles which we thought we’d share.

First, for you sailors, having your mast down for the winter is an excellent time to think about upgrades and improvements which might be difficult to make when the boat is in the water and someone would have to go aloft. Check out this piece on Marine Electronics from Sail Magazine.

For power boaters looking to enhance their current electronics systems with functionality and features found in newer components rolled out earlier this year, this article from Boating Magazine discusses integrating new technology into older systems.

We can help with either of these efforts. And, if you choose to do the work in the offseason, make sure you ask about our off-season rates. To learn more, check out our Marine Electronics page.

Thank you. And enjoy the rest of the late season.

(Photo credit:  Susan Cole Kelly)

Filed Under: Boat Maintenance, Marine Electronics

Late Season Maintenance Considerations

August 26, 2015 By EJ Vongher

It’s mid-August afternoon, the mercury is skyrocketing and all you can think about is stepping off the dock onto your boat and spending the next week cruising along the coast of The Long Island Sound. You’re set to shove off in the morning when your out-of-town crew will turn up but for now, you’re looking forward to an evening of air-conditioned bliss at the marina where you’ll plot your course for the next week.

LateSeasonBoatingWhen you arrive at the dock, things suddenly start to unravel. You immediately notice your boat AC isn’t working – perhaps the timer failed? As you step aboard, the normally welcoming aroma of your vessel has turned decidedly funky. The icing on the cake? When you go to raise your yard mechanic on the VHF, you realize it’s on the fritz as well. The triple whammy – no AC, a smelly boat and no radio. Dramatic? Yes. But not improbable. Two months into the boating season and your vessel has no doubt seen some heavy use so if maintenance or usage issues are going to crop up, now is as good (or rather, bad?) a time as any.

The first thing to note is that we here at Marine Special Products Group are on call for emergency repairs. Call DG on 1 (860) 718-0100. Related – we are experts in Marine Sanitation, Marine Air Conditioning and Marine Electronics so we will be able to diagnose your problem and come up with a plan.

If you are concerned about the viability of these critical systems prior to a lengthy cruise (or a lengthy visit from some out of town guests), we’d be happy to come inspect them for you and provide recommendations on their upkeep and preservation. While we do ask for a nominal inspection charge, it’s definitely in the ounce-of-prevention camp. Another thing to consider are these mid-season maintenance suggestions which might help get an older or stressed system through the season:

Boat AC

Let’s start with the easiest one first; a common cause of overworked or overloaded boat air conditioning systems (and boat refrigeration systems, for that matter), is dirty or clogged air return filters.  If you often have a pet aboard your vessel, the buildup of dust and hair can cause clogs. Other causes include docking your boat in more urban environments, construction going on in your marina or, not surprisingly, just you and your family being aboard as the average human being sheds more than eight pounds of dead skin annually! Given all these sources for dust, you can save yourself a major headache with a relative easy inspection and an almost as easy replacement, if warranted.

Most boat air conditioning manufacturers recommend that you chemically de-scale the condensing coil every 24 months so if you don’t recall when you did this last, you should probably look into it. In addition to avoiding breakdowns, a properly-descaled system will run more efficiently saving you power and money.

Another concern is water buildup in the condensation pans caused by condensation drain blockages, potentially resulting in flooding of floors and lockers and, consequently, mold or mildew buildup (and the associated odors). To avoid these costly and unpleasant possibilities, make sure the condensate pans are draining properly.

Marine Sanitation

While we work on a wide variety of marine sanitation systems, our comments here focus on Vacuflush systems which are as desirable for odor abatement as they are delicate. An overarching thought on marine sanitation systems: think of maintaining them in the very same way you treat your engine – monitor its performance closely and service it regularly.

Regarding maintenance, we’ll start with another easy one. When you are topsides, does your nose readily make you aware that a crew member has used the head? If this is the case, you very well may need to replace your holding tank vent filter. It stops odors from escaping through the holding tank vent and it is recommended to replace it annually.

Another area of concern are the duckbill valves in the vacuum generator. Most people don’t service these and just run them until they fail. When that failure happens is key though, isn’t it? The manufacturers recommend these be replaced every other boating season so if you haven’t done that, it’s something you should strongly consider.

Finally, if you are sensing any deficiency in vacuum pressure or seeing water or sewage leakage at the head, it may be time to replace your flush ball assembly or the teflon bowl seal. The manufacturer recommendation on this is to replace these parts every three-to-five years, depending upon conditions and use. A failure here in the wrong circumstances can really foul up a passage or a holiday weekend.

Electronics upgrades

In addition, now is a good time to think about mid-season software and firmware upgrades for navigational electronics.  Having the most current software and electronic chart data for your marine electronics can increase safety, ease of use and functionality.

Changes to chart information, GPS satellite constellations, tide and current data, and system reliability can affect the navigation system’s ability to safely guide you to your destination. Manufacturers of marine electronics are constantly making improvements to the user interface and experience. Frequently, software updates offer dramatic changes to the way you interact with your system.

New features are what it is all about. Over the past few years, software updates have unlocked on-screen control of autopilots, marine stereo systems, thermal cameras and electronic switching of devices, as well as networking of previously stand alone systems. We are well-versed in the latest Marine Electronics updates – let us review your system and see what enhancements can be made to your current setup to optimize your safety and enjoyment.

Finally, as we move into that tail end of the boating season, don’t forget to start thinking about both decommissioning as well as boat projects you’d like to tackle in the off-season. We’ll follow up with another post soon about our winter labor discounts.

Filed Under: Boat Maintenance, Marine AC, Marine Electronics, Marine Sanitation, Uncategorized Tagged With: Boat AC, Boat Maintenance, Marine Electronics, Marine Sanitation

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