The 1720C & 620 combination works well, allowing for a dedicated fishfinder.
The problem is mostly my eyes, I would like a bigger screen and also the updated charts.
The GP1870F seems like a nice upgrade, and I am asking just how close to 'plug & play' it would be to:
1. pull both the 1720C & 620, and just install the 1870F or
2. pull the 1720C, install the 1870F, and keep the 620.
I have a through hull transducer, and would prefer not to change it.
The decision will be based on the ease of any exchange of the units, and the improvement which results. Obviously, I will have to judge the value to me.
Thanks in advance for any hard knowledge, practical advice and opinions.
The problem is mostly my eyes, I would like a bigger screen and also the updated charts.
The GP1870F seems like a nice upgrade, and I am asking just how close to 'plug & play' it would be to:
1. pull both the 1720C & 620, and just install the 1870F or
2. pull the 1720C, install the 1870F, and keep the 620.
I have a through hull transducer, and would prefer not to change it.
The decision will be based on the ease of any exchange of the units, and the improvement which results. Obviously, I will have to judge the value to me.
Thanks in advance for any hard knowledge, practical advice and opinions.