Mark IA
Most commonly used in waterways that vary in season and weather or in shallow waters. The heavier ballast and shorter draft make this boom hug the water in wind and helps keep it free from ice. A great choice for canals, slips, channels, streams, swamps and ravines. Easily deployable.
Specifications
| Specifications | Freeboard | Draft | Overall | Weight/Ft | Standard Length | Ballast Tensile | Total Tensile Strength |
| Imperial | 6 inches | 6 inches | 12 inches | 1.75 lb | 100 feet | 3/8″ Chain | 14400 lbs |
| Metric | 15.2 cm | 15.2 cm | 30.4 cm | 0.79 kg | 31 m | 9.5 mm | 6538 kgs |