how the intercon coupler system works

(click photo to view animation)

(click photo to enlarge)

The Intercon System consists of a pair of port and starboard rams, which are installed in a structural support module on the tug. Each ram has a toothed "helmet" at the outboard end that engages a continuous rack of teeth on the barge notch wall, thus establishing a transverse, fixed horizontal axis about which the tug can pitch independently of the barge.

Onboard the barge, each side of the notch wall/skeg has a series of toothed castings vertically arrayed over a span representing the range of possible connection points between the tug and barge. The tooth pattern on the notch matches the tooth pattern on the tug, allowing for unlimited choices of draft on either vessel. The photo shows the starboard side rack installed in the notch of the barge 550-1.

Intercon Advantages

• Permits pushing in a wide range of sea conditions.
• Increases speeds 35-40% over towed units.
• Fuel savings enhanced by wheel and rudder efficiencies.
• Fully eliminates hull contact between tug and barge.
• Fail-safe mechanical connection with force monitoring.
• Crowley Intercon Units are fitted with a hydraulic power back-up connected into the emergency generator circuit for added safety.
• Engagement allowed regardless of draft or trim.
• Mechanical drive with engagement safeguards - not vulnerable to hydraulic or pneumatic system failures.
• Engaged and disengaged without crew on deck.
• Eliminates expense and hazards of hawsers, headlines, and cables.
• Comfortable ride resulting in less crew fatigue.
• Unmatched maneuverability at sea, and in port.
• USCG approved for Dual Mode under NAVIC 2-81.
• Worldwide product support from Intercon's service facilities.
• Designed and manufactured in America by one of the leading names in marine equipment.