Following is the table of special task organization Meaning visual call signs listed in ACP 129. Call   sign Meaning (Numeral   flag) Ø Commander Task Force No. 1 *Commander Task Group No. 2 *Commander Task Unit No. 3 *Commander  Task  Element  No. 4 Commander Fleet 5 6 Task Force No. 7 *Task  Group  No. 8 *Task  Unit  No. 9 *Task Element No. * Within own task organization Examples: 6p4p5 . . . Task Force 45 8p3 . . . . . . Task Unit 3 (within own Task Group) 9p2D . . . . Destroyers of Task Element 2 (within own Task Unit) 3p6. . . . . . Commander Task Element 6 (within own Task Unit) The special task organization call signs in the previous  list  have  been  extended  to  intra-USN messages transmitted by flashing light. Examples: CTF 50. . . . . Zero p5p0 CTG 50.3 . . . . . One p3 COMSIXTHFLT. . . . . Four p6 TF 50. . . . . Six p5p0 TG 50.3.5 . . . . . Seven p5 CONVOY  VISUAL  CALL  SIGNS.—Convoy visual call signs are contained in ATP 2, volume 2, or appropriate  national  or  regional  defense  organization publications. GOVERNMENT  SIGNAL  STATIONS.—On shore or on lightships, use the letter G as the visual call sign to call any or all the senior men-of-war. SHORE  SIGNAL  STATION.—In compliance with international procedure, the letter K (with complement if desired) is used to call or address shore stations. MILITARY   SIGNAL   STATION.—The following assignments are reserved for the signal station indicated: Call  sign Hp0 Hp1 Hp2 Hp3 Hp4 Hp5 Hp6 Hp7 Hp8 Hp9 Hp1p0 Hp1p1 Hp1p2 Hp1p3 Hp1p4 Hp1p5 Hp1p6 Hp1p7 Hp1p8 Hp1p9 Hp2p0 Hp2p1 Hp2p2 Hp2p3 Hp2p4 Hp2p5 Hp2p6 Hp2p7 Hp2p8 Hp2p9 Hp3p0) ) ) ) Hp3p9) Commander in chief Harbor entrance control post/port war signal station (HECP/PWSS) (main signal station) HECP/PWSS  (secondary  auxiliary  signal station) Port director Senior officr present afloat (SOPA) (when  ashore) SOPA   administrative   (when ashore) Flag officer, second in command Commander naval district Commander naval base Commander   naval   operating b a s e Commander naval shipyard Commander sea frontier Commander air station Commander amphibious base Commander section base Commander submarine base Degaussing station No. 1 Degaussing station No. 2 Degaussing station No. 3 Degaussing station No. 4 Deperming  station  No.  1 Deperming station No. 2 Reserved for local assignment by competent authority to shore signal stations not covered herein. 3-15