I am considering purchasing the Garmin GPSMAP 162 for my boat. I am
undecided about whether to get the internal or external antenna. There
is only a twenty bucks difference between the two so I thought I would
just get the external antenna model. But there might be a time when I
did not wish to use the antenna. So my question is, does the external
antenna model also have an internal antenna? That is, will it work
without the external antenna, or, once I choose the external antenna
model am I always stuck with providing an external antenna?

Ron Patterson