Signal Sierra Romeo

Broadcast Tower KT8 is located directly north of Little Lamplight and northeast of Vault 87. Upon activation of the tower you will receive the Radio Signal Sierra Romeo in Morse code. Down a cliff northeast of the tower is a Drainage Chamber which can be easily seen from your local map. This is one of nine Drainage Chambers broadcasting a Morse code signal.

Inside this tiny dungeon you will find some interesting things, including two Pre-War Books and a Motorcycle Handbrake and Motorcycle Gas Tank. There are two terminals, one broken and the other with some mixed script with the error of an "invalid decry.key" when activated. Behind you on the third desk lies the Decryption Key. Use it on the encrypted terminal to open the trap door on the floor to your right.

Downstairs you will find your Ham Radio signal source and two Dead Chinese Remnant spies. In this chamber there's also a Mini Nuke, a Chinese Army: Special Ops Training Manual, a Chinese Commando Hat, two bottles of Purified Water under the desk, and various other objects.

The Morse Code sequence being broadcast is

Section 1: −•−• −−•− −•−• −−•− −•−• −−•− −•• • Section 2: ••• •−• ••• •−• ••• •−• −•−

Section 1 is the letters 'C' (−•−•) and 'Q' (−−•−) repeated 3 times followed by the letter 'D' (−••) and 'E' (•) 'CQ' is a general call out to any nearby radio or Morse Code operators. Appending the letters 'DE' to a CQ call indicates that the source of the transmition is about to be disclosed. Source

Section 2 is the letters 'S' (•••) and 'R' (•−•) repeated 3 times, followed by the letter 'K' (−•−). It is assumed that "SR" stands for "Sierra Romeo", and "K" is a shorthand designation of "over".