SOP at Manch....Contact Manchester "When Instructed" xxx.xx
OR if bandboxed [on Area] Contact Manchester When Instructed "non-standard freq" xxx.xx
Many [many] moons ago, Tower gave a "Clearance" to an RSAF C130. The C130 was taxying to the HOLD for R/w 24. The "Clearance" was a "SID", contact Departure, 124.2. The a/c stopped at tne Holding Point. Did his Power checks, then called Departure...at the Holding Point He was cleared (by Radar [departure]) to cilmb s/a 3500, turn Left Heading 160, climb FL60.
This he did.....except...he had NOT been cleared for TakeOff
Hence NOW the "When Instructed" addendum
bb