**Cmdr Backflaps** (also known as Kal/Kalearne) presents a useful guide to **analysing octal messages** from the **Unknown Link**. This is the method used for locating additional **Unknown Sites**, but is also relevant to analysing **Unknown Probe** messages.

Cmdr **Redden Alt Mer** then gives details on how to **translate** the transcribed audio into a set of distances from **Merope** that then lets you identify the final location:

The signal received from the UL can be translated to binary, considering high tones as 0s and low tones as 1s. Using message #1 in our current example, this: hhl hlh hll / lll llh lhh lll / lll llh lhh hll lhh lhl / hll lll hlh becomes this: 001 010 011 / 111 110 100 111 / 111 110 100 011 100 101 / 011 111 010 Once we have the binary, each couple represent two operands, a dividend and a divisor. To pass from this binary representation to the actual numbers, we need to first translate each octet (e.g., 001) into a single digit: 001 -> 1 010 -> 2 011 -> 3 ... Doing so for the first set of operands, for example, will give us the following: 123 / 764 From our previous studies on the UP signal, and from observation (all the digits are always in the [0-7] range), we can assume that this must be interpreted as octal numbers (which are normally represented with a prefix 0 to distinguish them from decimal numbers). Converting them to decimal, will give us: 83 / 500 All that's left to do is to apply the division to all of the three and get a measure of the distance, respectively from Merope, the system where the message was collected, and Col 70 Sector FY-N c21-3, expressed in ThargMeters (THm), i.e., the distance between Merope and Col 70 Sector FY-N c21-3, roughly 871.02Ly. Applying the steps above to message #1 of our current example, we get: 0123/0764 -> 83/500 = 0.1660THm -> 144.5883Ly 07/0764 -> 7/500 = 0.0140THm -> 12.1942Ly 0345/0372 -> 229/250 = 0.9160THm -> 797.8487Ly These three distances will allow us to trilaterate the next system pointed by this message.