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Cancel HYDROARC 172/21 and this msg, HYDROARC 173/21 refers

Canada-north Coast · HYDROARC 174/21

issued: 2021-08-09 14:19Z
status: cancelled 2021-08-09 14:19Z (archive)
cancels: HYDROARC 172/21
authority: SFH 091316Z AUG 21.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

CANADA-NORTH COAST.
DNC 28.
CANCEL HYDROARC 172/21 AND THIS MSG,
HYDROARC 173/21 REFERS.

Timeline

Mcts iqaluit remote station resolute 74-45N 094-58W hf rt transmit frequency 4363 khz off aircancels · 2021-08-07
Mcts iqaluit remote station resolute 74-45N 094-58W hf rt transmit frequency 4363 khz off airreplaced · 2021-08-07

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Everything the classifier did not place elsewhere. All current other warnings →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.