Application Notes
Using Immersion Alarm at Fresh Water Shorelines
The following applies to fresh water having NO sea water influence. For use in sea or brackish water, see Safety Turtle and Salt Water.
The Turtle can signal from many feet under water. The Turtle may therefore be worn anywhere on the person, except under clothing that might prevent or delay it getting wet on entry in the water.
The coverage of a shoreline will always be limited, because the Base Station alarms on the presence, not the absence, of a signal. The User must be aware of the limits of coverage.
In a clear line-of-sight, with the Base Station at waist level or higher off the ground, expected range is 200 ft. (60 m.). So a Base Station situated at a shoreline can potentially cover 200 ft. (60 m.) in each direction, for a total of 400 ft. (120 m.)
| Safety Turtle is not a substitute for diligent supervision or adequate barriers to restrict a child’s shoreline access. Shoreline coverage must be tested at set up. |
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If the Base Station is set back from the shoreline, the length and in some cases the continuity of shoreline coverage will be reduced by:
- The set back distance
- Signal reduced or blocked by trees, ridge, etc.
- Signal reduced or blocked by building exterior (if located indoors)
Consider the following options and tradeoffs:
- Option 1 [Standard System] – Base Station is located in the residence. This is most suitable when the residence is within 30 ft. (10 m.) of the water and the shoreline is completely visible. The Base Station should be high enough to clear any ridge blocking view of the shoreline. Locating outside on a deck will provide best coverage.
- Option 2 [Standard System] - One or more Base Station(s) is located at the shoreline. Alarm audibility in the residence may be inadequate.
The Base Station needs to be protected from the elements. A rain canopy may be preferred to a full enclosure or Safety Turtle carrying bag as it does not reduce alarm volume.
- Option 3 [Commercial/Extended Range System] – similar to Option 2 plus Secondary Alarm in residence. This option overcomes the shoreline and audibility coverage limitations of Options 1 and 2 respectively.
Note: If electricity is not available at the residence, a car battery or solar-charged battery unit may be used to power the Base Station, which draws only 75 milliamps [when not alarming]. Alternatively, Turtle Power can provide 9 hours per day operation, when charged nightly by the car battery, using the 12V Cigarette Lighter Adaptor accessory.
Using Safety Turtle Personal Immersion Alarm with Sea and Brackish Water Shorelines
See Safety Turtle and Salt Water
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