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 Why should I use the postcode?
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Any letter that is correctly addressed with the right postcode can be sorted quickly and accurately by Royal Mail using their automated sort machines. However, letters without a postcode (or with an incorrect code) have to be sorted manually, which means that your mail will take longer to deliver. In the worst cases, it may even result in the letter being sent to the wrong destination.
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How should I address a letter correctly?
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Every house and business in the UK has a complete postal address; setting out this address in the right format can ensure that your letters and parcels are delivered quickly and accurately. Addressees Name
Name of Company (if applicable)
Building Name (if applicable)
Number of Building and Name of Thoroughfare
POST TOWN (in capitals)
Postcode
For example: Ms H Brown
XYZ Company
XYZ House
197 Main Street
ANYTOWN
AN1 1AB
You do not need to include a County name as long as the Post Town and Postcode are used.
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I'm about to move house - can I keep my postcode?
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Postcodes are specific to the address - not to you. So unless you are moving to a property close by (a postcode identifies a group of up to 80 addresses), then you will probably have a new postcode.
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What is the Global Positioning System?
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The Global Positioning System (GPS) is a constellation of U.S. Government Satellites providing the most advanced and accurate positioning and navigation service in the world. Equipped with atomic clocks, twenty-four GPS satellites orbit 12,000 miles above the earth transmitting the exact time and their position in space.
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What is a GPS receiver?
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A GPS receiver is an electronic device that listens to satellite signals and uses the information to determine and display the receiver's location; speed, altitude and heading.
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Does GPS work indoors?
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In general, GPS antennae need to have line of site with the satellites that they are tracking. Although an antenna will pick up a signal through most materials, it will not work through brick or concrete.
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Do I need a map and a compass if I use a GPS system when out hiking?
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A GPS is not intended to be a replacement for a map and compass, but should be used in conjunction with them. The maps on even the most advanced receivers are not as detailed as good quality paper maps, and there are inherent inaccuracies in the compass calculations made by GPS units, especially at low speeds, that make GPS units a handy additional tool for outdoor enthusiasts, rather than a replacement for traditional equipment.
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What is the difference between a 'warm start' and 'cold start' acquisition time?
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GPS satellites broadcast two types of data - almanac (not very precise, but valid for several months), and ephemeris (highly precise, but valid for only 6 hours). When a GPS unit is switched on, it uses its stored versions of these two data sets from the last time it was used in order to locate satellites. If the ephemeris data is still 'fresh', then this process will be very quick, and is termed a 'warm start'. If the data is 'stale', a 'cold start' will be performed, with the unit having to collect a full set of new data, resulting in a longer acquisition time.
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