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Diplotop - product comparison - gathers GARMIN GSD 21 users reviews, tests and opinions.With a data base of unprecedented wealth, 15 reviews for the GPS GARMIN GSD 21, Diplotop compares the GPS GARMIN GSD 21 with its competitors in order to find the best.

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GARMIN GSD 21 Reviews

Its users find that the GARMIN GSD 21 doesn't have any particular problems of user-friendliness.They find it very reliable., But they don't all share the same opinion. You can look at the GARMIN GSD 21 forum to identify problems that users have come across and the suggested solutions.

According to its users, it is very efficient., But they are very divided on this point. On average they find that it's price is right You can download the GARMIN GSD 21 user manual to ensure that its features correspond to your needs.
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Manual abstract:
Use the CANet Extension Cable or 22 AWG, 4-conductor shielded cable for data connections and 18 AWG for power. Ground the drain wire at the display unit. Do not ground the drain wire on the sonar unit. The Orange wire must be pulled low (-) in order for the GSD 21 to power on. Option 1: If the GSD 21 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 21 and the GPSMAP 276C/296/376C/396 turn on or off when power is applied or removed form the Red wire. Option 2: If the Red (+) wire is applied directly to a power source, install a switch between the Orange wire and ground. The GSD 21 turns on or off when ground is applied or removed from the Orange wire. When crimping the 3-wire connector, use a standard pair of pliers and make sure the button is fully depressed into the connector. GSD 21 Sonar Module Serial Wiring for the Garmin GSD 21 to a Single GPSMAP 182/182C/192C/232/292/392/492 GSD 21 Sonar Module FUSE 3A RED RED BLACK WHITE/BLUE BLACK BLUE BROWN ON OFF WIRE COLOR WIRE COLOR FUSE 2A GARMIN GSD 21 SOUNDER MODULE WHITE/BROWN SEE NOTE 3 OPTION 1 ORANGE TO TRANSDUCER ON SEE NOTE 3 OPTION 2 OFF BATTERY 10-33 VOLTS DC Notes: 1. You can extend the serial/power wiring of the GSD 21 power/data cable up to 100 ft (30 m) total length. Use the CANet Extension Cable or 22 AWG, 4-conductor shielded cable for data connections and 18 AWG for power. Ground the drain wire at the display unit. Do not ground the drain wire on the sonar unit. The Orange wire must be pulled low (-) in order for the GSD 21 to power on. Option 1: If the GSD 21 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 21 and the GPSMAP 182/182C/192C/232/292/392/492 turns on or off when power is applied or removed from the Red wire...

Ease of use
The users were asked the following question :

Is the GSD 21 easy to use?

15 users answered questions and rated the product on a scale of 0 to 10. The rating is 10/10 if the GARMIN GSD 21 is very user-friendly.

The reviews (rough results) are presented in the following graph :

22100001045
012345678910

By leaving the mouse on a column for a few seconds, you can see the number of people who voted to make up the score that appears in the horizontal axis.

Statistical data :

= 6.47
= 4.10

The average score balanced by the number of reviews is 6.47 and the standard differential is 4.1.
High-performance
The users were asked the following question :

Is the GSD 21 highly efficient?

15 users answered questions and rated the product on a scale of 0 to 10. The rating is 10/10 if the GARMIN GSD 21 is, in its domain, the best on a technical level, the one offering the best quality, or offering the largest range of options.

The reviews (rough results) are presented in the following graph :

20101000218
012345678910

By leaving the mouse on a column for a few seconds, you can see the number of people who voted to make up the score that appears in the horizontal axis.

Statistical data :

= 7.40
= 3.72

The average score balanced by the number of reviews is 7.4 and the standard differential is 3.72.
Reliability
The users were asked the following question :

Is the GSD 21 reliable, sturdy?

15 users answered questions and rated the product on a scale of 0 to 10. The rating is 10/10 if you think that the GARMIN GSD 21 is a sturdy product, which will last a long time before breaking down.

The reviews (rough results) are presented in the following graph :

20011000317
012345678910

By leaving the mouse on a column for a few seconds, you can see the number of people who voted to make up the score that appears in the horizontal axis.

Statistical data :

= 7.33
= 3.57

The average score balanced by the number of reviews is 7.33 and the standard differential is 3.57.
Value for money
The users were asked the following question :

Is the GSD 21 good value for money?

15 users answered questions and rated the product on a scale of 0 to 10. The rating is 10/10 if you think that the GARMIN GSD 21 is really not expensive considering its features.

The reviews (rough results) are presented in the following graph :

20100101523
012345678910

By leaving the mouse on a column for a few seconds, you can see the number of people who voted to make up the score that appears in the horizontal axis.

Statistical data :

= 6.80
= 3.33

The average score balanced by the number of reviews is 6.8 and the standard differential is 3.33.

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