Some guys prefer smoke flares. I've used pencil flares in anger on a windy day in Hout Bay (the story is in the Rob's Tales section somewhere) and they are effective.
Smoke flares make a big cloud of red smoke, but they're much bigger and you generally can only carry one. You get six chances with pencil flares!
But flares are a bit dodgy without another means of communication - it's one thing to attract attention when you pop the flares but it will usually take some time for the rescuers to get to you and it's really nice to be able to talk them in to your location - a cell phone or ideally a VHF is great to have.
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...