verb / noun
holler
HAH-ler/ˈhɑːlər/
A loud shout or call.
She hollers across the noisy playing field.

Etymology
Hollo was a shout used especially to call hunting hounds. Holler preserves that loud calling sense and belongs to the same family of attention-getting cries as hello.
In context
I saw our men already got out into the boat and Rowing for life to the ship I was going to holler after them