HYDROPAC messages in force 171100Z apr 2004

Original warning text

1. HYDROPAC MESSAGES IN FORCE 171100Z APR 2004. ONLY THOSE
   MESSAGES ISSUED DURING THE LAST SIX WEEKS ARE LISTED HEREIN.
   2004 SERIES: 426(74), 438(93), 453(61), 455(73), 460(94),
   464(63), 465(63), 485(81), 487(76), 493(63), 494(61), 495(61),
   523(63), 527(71,93), 530(61), 534(29), 537(76), 552(76),
   558(94,95), 559(94,95), 560(95), 561(95), 562(94,95),
   563(94,95), 564(71), 572(83), 573(74), 583(61,63), 587(63,71),
   588(63), 589(81), 592(61), 593(61), 600(62), 604(76),
   610(19,81), 614(63), 617(63), 620(63), 622(GEN), 623(76),
   624(82), 629(81,92), 635(63), 643(22),  650(74), 655(71,93),
   657(63), 658(63), 659(63), 660(22), 661(93), 671(71,93),
   673(63), 675(95), 677(63), 678(81), 679(76), 680(62),
   681(63), 682(76), 683(22).
2. THE SUMMARY OF ALL HYDROPAC MESSAGES IN FORCE
   AS OF 11 DEC 2003 IS GIVEN IN SEC III OF NM 52/03.
3. CANCEL HYDROPAC 394/04, 645/04.