[PUP] Ice Dancer stabilizers

[Georgs Kolesnikovs]

In answer to a recent question:

Ice Dancer II, a 57 Nordhavn, has TRAC stabilizers that were 
manufactured by American Bow Thruster.  The system is digitally 
controlled with hydraulically powered, active fins.  It has a good 
reputation for reliability, and so far has performed without failure. 
We engage the system whenever the boat is in operation.  At rest, 
pins are inserted to prevent currents and gravity from moving the fin 
blades.  At very low speeds or in reverse gear, fins are centered to 
prevent damage from surge.

Ice Dancer (I), our previous 50 Nordhavn, had Koopnautic stabilizers. 
This system was constructed for larger boats, but was installed on 
the 50 for high reliability.  It seemed to have a more sensitive 
control system, but not materially different in performance from the 
TRAC.

Dick and Gail Barnes
Aboard Ice Dancer II
40 miles south of Antofagasta, Chile
1/1/07
24 17S lat.  070 34W long.