[Olsen Towing Line tugboats.]

[Olsen Towing Line tugboats.]

[Olsen Towing Line tugboat.]

[Tracy Towing Corporation tugboat pulling McLain Line barges in New York Harbor.]

[Tugboat at dock.]

[Tugboat near dock.]

[Docked tugboats.]

[Men working on tugboat.]

[Alice M. Moran tugboat.]

[Detail of docked tugboat.]

[Men working on tugboat.]

[Grace Moran tugboat at dock.]

[Lee-Simmons tugboat.]

[Peter Moran tugboat.]

[Tugboat.]

[Tugboats with ship.]

[Moran tugboats with ship.]

[Moran tugboat with ship.]

[Tugboat next to ship.]

[Close-up view of Moran tugboat funnel.]