That is providing the shunt does not fail. If the shunt fails you are just going sideways unless you can shift the CLR aft or the CoE forward or both.  The big rudders will do the first providing you have water depth to play with.  The schooner rig will do the latter.  So with big rudders and schooner rig it would be extremely unlikely for a shunt to fail and should never be caught in irons.  May not be able to tack but should always be able to shunt successfully without motor assist.

With the 18m proa the rudders are just on the verge of being able to sail out of irons but it takes minutes of going sideways with the leading rudder perpendicular and the aft rudder in line to get it to slowly swing off the wind.  When tight tacking in a narrow channel we have the windward thruster energised and ready to drop down if needed to get moving after a shunt.   

Rick

On 19 Nov 2018, at 10:50 am, Mike Crawford mcrawf@nuomo.com [harryproa] <harryproa@yahoogroups.com.au> wrote:

The good news is that with the proa I'd never have to worry about blowing a tack to close to shore and then heading into the rocks.