@Bushwalker8 and babj615,
Your technical info is super and very informative even if you two do not see eye to eye on issues.
That being said the GPSMAP 66 series GPS units are for recreational use they lack being about to attache an external antenna to them. In fact there are only a couple of GPSMAP series GPS units that let you add an external antenna to improve the accuracy of the GPS units.
Most users are satisfied with the GPSMAP 66 series with updates come from time to time to improve them.
This does not taking away from what you both have pointed out but will have little or no effect on the average recreational user of these GPS Units....
Even the forum GPSrChive that is dedicated to Handheld units has not responded to the original post on their forum.
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