I think flares are really good on a dark night out of town. People notice them, In town, not so much, Coastguard did a flare test exercise about three years ago, to check visibility etc. They let 5 different flares - including handheld and rockets off. Positions a] Motuihe Passage b] Bean Rock and c] Orakei.
Thought we'd get lots of calls from people reporting - I mean, 15 flares all up.
Total number of calls coming in to the ops room on that night - 8, in a city. I think that around Auckland Harbour there's just too many lights.
So - I carry flares for when I'm out of the harbo