ATB (Articulated Tug/Barge Unit)

Category:

Navigation/Positioning Systems

Description:

A tug/barge combination in which the tug is secured in a notch located in the stern of the barge,

by one of several mechanical systems. The system allows some freedom of motion between the

tug and barge with the predominant one being relative pitch about the Y axis. All systems

restrain the roll of the barge providing an easier ride in heavy seas. Other features include:

1. ATB can be quickly disconnected. Does not require a dedicated tug as does an ITB (integrate

tug barge) system.

2. Less hydrodynamic drag than conventional towed barge systems, faster, less fuel consumption.

3. Safer than conventional towed barge systems.

4. Good seakeeping/control up to 12-ft seas (have survived 48-ft head sea). Currently 27 units in

service for oil, aggregate, and cement transport. No bottom dump or split hull barges in service

currently.

Potential application: Large dredging projects requiring long hauls to the dump site in the open

ocean.

Outfitting cost would depend on size. Could cost up to $1,000,000 per unit.

Reviewer:

C. Woolley

Company / Organization(s):

Chapter 5 Other Technologies Reviewed