Clockwise: Super Max Pivoting Arm, Super Max Rigid, Barnacle,and XYZ
Clockwise: Delta, West Marine Danforth, Bullwagga, Digger, and Spade
L to R: Bruce, CQR, and Fortress
The tugboat Commodore, one of the Gulfport Towing Company’s fleet, was used as the test vessel. The vessel was off shore at the time of the test representing actual anchoring conditions. This tugboat has a 1200 horsepower Fairbanks-Morse diesel engine and a 72 inch propeller. A Dillon dynamometer was used to measure the pull pressures on the rodes. Scopes were applied as per the manufacturers’ recommendations as well as their recommendations regarding chain or nylon anchor rode.
Anchors were dropped from the stern of the Commodore and straight pulls were measured. The vessel’s momentum from the wind was sufficient to set each anchor. Since the wind varied, differing setting pressures were seen. Setting was determined when the boat came to a complete stop. After setting, force from the engine was applied to determine the point when dragging occurred. It was deemed unnecessary to do 90 degree offset pulls as the soft bottom would allow each anchor to turn to the new position effortlessly.
|Anchor||Weight||Scope||Setting lbs||Dragging lbs.|
|Spade||16.5 lbs||6-1||N/A||130 lbs|
|XYZ||17 lbs||5-1||200 lbs||400 lbs|
|Digger||17 lbs||5-1||N/A||Not measurable|
|Fortress FX37||21 lbs||6-1||N/A||Not measurable|
|26 lbs||6-1||N/A||200 lbs|
|BullWagga||29.5 lbs||5-1||300 lbs||390 lbs|
|Delta||35 lbs||6-1||400 lbs||900 lbs due to obstruction
|CQR||48 lbs||6-1||N/A||575 lbs|
|Bruce||46.5 lbs||6-1||N/A||400 lbs|
|Super Max 17
|52 lbs||6-1||570 lbs||700 lbs|
Preparing to Launch Spade Anchor
Launching Super MAX Anchor
The conclusions reached from this test were that only four anchors provided a set in this soft bottom:
- Super MAX
- XYZ prototype
Only the Super MAX anchor provided security up to 700 pounds of pull, while the others dragged when the pressure reached 390 and 400 pounds. The XYZ and the Super MAX anchors are deep penetration anchors by design. It is believed that with time and constant pressure, both types would penetrate deeper and thus create added holding pressures. Since the Super MAX anchor has an adjustable arm that can be changed for differing types of bottom conditions, it appears to be the best anchor for all-around anchoring, since it has been proven in others’ tests in sand, gravel and coral bottoms.