hailing distance

There were a half-dozen boats within hailing distance, similarly anchored, including Skipper Martel and his pinkey.

When within hailing distance they stopped, and seemed afraid to come nearer.

The pursuing proa, he noticed had approached much nearer, almost within hailing distance.

He pointed to the little schooner which was almost within hailing distance.

On they ran till, within hailing distance of the camp, the girl gave the wolf-call.