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Admiralty total tides 2021 advisory

HYDROLANT 564/21

issued: 2021-02-26 14:32Z
status: cancelled 2021-04-09 00:01Z (archive)
authority: SFH 261430Z FEB 21.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

ADMIRALTY TOTAL TIDES 2021 ADVISORY.
1. BE ADVISED THAT ADMIRALTY TOTAL TIDES (ATT)
   DISCS DISTRIBUTED IN FEBRUARY 2021 ARE
   INCORRECTLY LABELED AS EDITION 21.
2. CORRECT VERSION WILL HAVE AN ED DATE OF 202101
   AND ED NO 021.
3. NGA RECOMMENDS INSTALLING THE DISC UPON RECEIPT,
   AS THE PREVIOUS ATT, EDITION 21, WILL EXPIRE ON
   MARCH 31, 2021.
4. ATT ED DATE OF 202101 ED NO 021 WILL EXPIRE ON
   MARCH 31, 2022.
5. CANCEL THIS MSG 09 APR 21.

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