Saturday, 7 February 2009
GPS and sat nav
I was "given" two toys recently (I bought them, and they were given to me as birthday and Christmas presents). The first was a Garmin Nuvi 250 sat nav for the car; the other was a Garmin etrex H hand-held GPS device. The main reason for both was to be able to measure reasonably accurately my boat speed, and test the theory that more revs doesn't always result in more speed.
As I have already mentioned the device intended for the car will, in "pedestrian" mode, give a speed to the nearest tenth of a mile per hour: good enough for the boat. So do I sell the etrex H or keep both devices?
Advantages of the car device: large bright screen; has maps; can run from 12V supply. Disadvantages: not waterproof; can't replace internal rechargeable battery (which is supposed to last 5 hours before needing a recharge).
Advantages of hand-held GPS: waterproof (supposedly) and fairly robust; easy to replace its two AA batteries; logs moving time as well as stopped time. Disadvantages: screen difficult to read; no maps; can't use to navigate in car.
I am really, really bowled over by the Nuvi 250 sat nav. It's amazing! (Never had a sat nav before, so I'm easily amazed!) As well as having European maps I can use it on the boat!