A Question about GWX 3.0 Radio Messages

[Joefour]

Originally Posted by Pisces

Oh, and in case you want to check the lat/long grids: 120 km for every degree away from the equator and Greenwich Meridian. 2 km per minute of arc.

Gotcha. Thanks.

[David Brock]

Some what off-topic.... But I have come to hate the saying "New message received" 90% of the message are totally useless to me. Which I had a better radio operator so he new which ones to bin and which to actually notify me about.

[ParaHandy]

Along similar lines, can someone advise me what the 6 digit grid references mean? For example BE2438 etc, as opposed to the AANN references.

[ReallyDedPoet]

I think the below states it fairly well, found it when searching on Google.

A six figure grid references is a reference method used to pin point a location within a square. It is composed of the x-axis (also called the easting or the distance along the map) and the y-axis (northing or the distance up the map). When locating a place on a map using this method, you will have 6 numbers e.g. 216 322 (216 being the easting and 322 being the northing).

I think the reference to pin-point a location is key, some of our real navigation experts at SUBSIM should be able to tell you more

Welcome to SUBSIM by the way

[BigWalleye]

Originally Posted by ParaHandy

Along similar lines, can someone advise me what the 6 digit grid references mean? For example BE2438 etc, as opposed to the AANN references.

The AANN map reference was actually AANNNN. The KM grid system went down two more levels. There are some posts around (and information at other sites) which will let you trace down to that level. Here's one: http://www.subsim.com/radioroom/showthread.php?t=124408.

The six-character grid reference gives you a lot less ocean to search.

Here's a draggable overlay that lets you see the six-character grid on the SH3 nav chart: http://www.subsim.com/radioroom/down...o=file&id=4196

[ParaHandy]

Originally Posted by reallydedpoet

Welcome to SUBSIM by the way

Thank you

Originally Posted by BigWalleye

The AANN map reference was actually AANNNN. The KM grid system went down two more levels. There are some posts around (and information at other sites) which will let you trace down to that level. Here's one: http://www.subsim.com/radioroom/showthread.php?t=124408.

The six-character grid reference gives you a lot less ocean to search.

Here's a draggable overlay that lets you see the six-character grid on the SH3 nav chart: http://www.subsim.com/radioroom/down...o=file&id=4196

Yeah, my mistake. I should have said what do the AANNNN references refer to as opposed to the AANN ones.

[Pisces]

The 2 letters stand for a particular rectangular area on the map/globe. Mostly in alphabetical order, but not completely sequential around the globe. The coverage of sea and coastline was guiding.

Then each number digit resemble a subdivision of the larger rectangle. Divide it up like a 3x3 telephone numberpad. 1 at the top-left, 9 at the bottom right. The number of the digit in the grid-reference determines which 'button' to consider. Then further sub-divide the button by 3x3. And take the next number digit in the grid-reference to narrow down to smaller area. And so on, and so on, until it is pinpointed sufficiently.

There should not ever be a 0 in that gridreference. But you'll eventually come a cross a gridreference in the game, either given by SH3 Commander as a patrol assignment, or by some radiomessage, of something like "BF10" or "AM10". You can ignore that. Or any patrol grid assignment really. Nobody will blame you if you ignore such orders.

[ParaHandy]

Originally Posted by Pisces

Then each number digit resemble a subdivision of the larger rectangle. Divide it up like a 3x3 telephone numberpad. 1 at the top-left, 9 at the bottom right. The number of the digit in the grid-reference determines which 'button' to consider. Then further sub-divide the button by 3x3. And take the next number digit in the grid-reference to narrow down to smaller area. And so on, and so on, until it is pinpointed sufficiently.

Thanks fella, this is the part that I really couldn't fathom out. So if it was for example BE2855, that would be slap bang in the middle of BE28? BE2899 would be south-east corner of BE28?