Frequently Asked Questions

We can’t answer every question on this page and so if there is something you want to know but can’t find it anywhere on our web site or below, please send an email to

We aim to respond to all enquires within 48 hours.

Do Pingers scare fish?

No. All major scientific trials using Pingers over the past 20 years shows that Pingers have no effect on any fish species.

To what depth can I use Pingers?

Future Oceans Pingers operate using 2 x water contacts. There is no minimum depth required to use our Pingers – as long as the Pinger is completely submersed under water, they will operate.

Future Oceans Pinger external casings are tested in the USA by Teledyne Seabotix Inc to 2200 PSI, equivalent to 4700 feet/ 1400 meters. Our product warranty extends to using our Pingers to 4700 feet / 1400 meters.

Does using the Dolphin Pinger attract seals and sea lions?

Seals and sea lions cannot be attracted as they cannot hear the high frequency Dolphin Pinger.

Do I have to maintain the Pingers?

If the Pingers are maintained you will get better life expectancy.

It does not hurt to wash the Pingers down with fresh water. Always check the condition of the O ring when changing batteries. If it looks worn, replace it with a -026 size O ring. Add a silicone based grease to the O ring and male threads.

Do Pingers work on all gear?

Yes!  Provided spacing requirements are met and you are using the right Pinger for the right species, the Pingers will alert marine mammals to whatever gear they are deployed on including:

  • Set nets
  • Purse seiners
  • Line and trap gear
  • Aquaculture facilities.

In fact any infrastructure that might accidentally entangle Porpoises, Dolphins or Whales should be fitted with Pingers.

How many Pingers do I need on my net?

Under European EC standards, and USA NMFS regulations, the Porpoise Pinger 10 kHz must be spaced every 100 meters, 300 feet or 50 fathoms on gill nets.

We apply this same spacing recommendation for our Dolphin Pinger.

We recommend spacing the Whale Pingers every 50 meters, 150 feet or 25 fathoms on all gear.

Why do Pingers “blink”?

Future Oceans 10 kHz Porpoise and 70 kHz Dolphin Pingers incorporate a very bright LED inside the casing.

The LED will allow fishermen to confirm if Pingers are operating simply by observing if the Pingers are “blinking”. This removes any uncertainty for fishermen and regulatory authorities who test if Pingers are operating. We have used very small but powerful LED’s ensuring that the blinking light is visible even in broad daylight. Pingers only blink for the first 60 seconds when they are in the water and then again for 60 seconds when they are taken out of the water. This eliminates attracting non target species to the Pingers.

My crew tells me that they can hear the Porpoise Pinger but I can't – why?

As we age, our hearing capacity is reduced, especially when it comes to high frequencies. While some people hear the 10 kHz frequency emitted by the Porpoise pinger, a lot of people cannot.

Future Oceans Pingers now incorporate a very bright LED inside our Pingers negating the need to listen to a Pinger to hear if it is working.The LED will flash for 60 seconds on its start-up cycle going into the water and then again during its shut-down cycle so you can see that the Pinger is operating. You can see the LED in action on our Porpoise Pinger page.

Do Pingers stop seals and seal lions from taking my fish?

No. As yet there is no proven, long term humane acoustic solution to the problem of seals and sea lions taking caught fish from nets (so called “depredation” or “foraging”).

How do I change the batteries?

Changing batteries is a very simple operation. Simply unscrew the two ends of the Pinger, slide out the battery tray which houses the battery, remove the battery and replace it.

Always change batteries in a dry environment!

How does the Whale Pinger work?

Future Oceans Whale Pingers produce a 3 kHz frequency with a signal strength of 135 decibels. The Whale Pinger is highly effective in keeping Humpback Whales out of any gear where the Pingers are deployed.

My Pinger is in the water but it does not seem to be operating. Is there something wrong?

No. The Pingers have an automatic start up cycle. It may take up to 60 seconds for the Pingers to begin operating once they are immersed in water.

Do they come with a warranty?

Yes. We offer a conditional 12 months warranty on our Pinger products. Future Oceans batteries must be used to comply with warranty.

Why can't I hear the Dolphin Pinger?

Humans can hear up to about 16 kHz. The Dolphin Pinger operates at 70 kHz and is inaudible to humans.

Where do I get replacement batteries and are they expensive?

Our distributors stock batteries, or please e mail us at Future Oceans distributorssell batteries for around US $10.00 (may vary slightly country to country).

Future Oceans batteries MUST be used in our Pingers to ensure our warranty remains valid.

How long do the batteries last in each Pinger?

The Porpoise and Dolphin Pinger batteries will last for a minimum of 12 months based on 12 hours per day use 365 days a year.

The Whale Pinger batteries will last 120 days based on 12 hours use per day.  (60 days based on 24 hours use per day).

You can order replacement Pinger batteries from any Future Oceans Distributor

What's the difference between the Porpoise and Dolphin Pingers?

The Porpoise Pinger was designed specifically to deter Harbor Porpoises from all fishing gear. It operates at a 10 kHz frequency and delivers signal strength of 132 decibels.

The Dolphin Pinger was designed to deliver a stronger signal than the Porpoise pinger. The Dolphin Pinger delivers a 145 decibel signal. The frequency of the Dolphin Pinger is 70 kHz – this is in the best known hearing range of most Dolphin species.

Do I have to do anything to the PIngers to make them operate?

Future Oceans Pingers are designed to work as a hands free product. The two water contact switches turn the Pingers on once they are immersed in water and the Pingers shut down automatically when the Pingers are removed from the water.

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