Online alarm clock for 12:34 am
You have just woken to assemble the coastguard team for a night search, so use 12:34 am as the point to sit up, check the call-out details and start getting ready. There are 26 minutes before 1:00 am, enough time to confirm the search area, pull on warm layers and make sure essential gear is together without rushing half-awake.
While the coastguard response information is open, set this browser alarm for 12:34 am and keep its page in the foreground where possible. Moving the page behind other tabs can lead some browsers to limit its activity, especially when power-saving settings take over. The alarm cannot wake a sleeping phone or sound after its page has been closed, so a coastguard search could be delayed if this is your only alert. Use a separate phone alarm as backup for a call-out that cannot wait.
Before stepping into the quiet New Zealand night, keep voices and vehicle doors subdued near sleeping households, then reassess once you reach the muster point. Background sound is sparse around 12:34 am, which makes radio audio, loose equipment and an idling engine seem louder than they would by day. Pack metal items so they cannot knock together, and test communications at the lowest practical volume before departure.