Nikon 58-104 - Manual (Page 54)

Using the Flash Signal Function
ii'
The flash signal function serves to
indicate your position in the sea
when resurfacing from under water.
1 Turn ON the SB-104’s power switch.
I Slide the function selector to the
I Test position V and hold it
down for about four seconds.
—From the second firing, the flash will
repeat firing at 1 /32 output about every
two seconds.
—A fully-charged NiCd battery will let the
SB-104 continue firing in this mode about
3000 times (about one and a half hours).
I Turn OFF the power switch to stop.
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