Luedtke Engineering’s tug KRISTA S. arrived at Great Lakes Ship­yard on Fri­day, March 22.  It was hoist­ed out of the water using the 770-ton trav­elift.  The tug is being dry­docked for an under­wa­ter hull sur­vey and var­i­ous repairs.  The KRISTA S is expect­ed to be back in the water some­time ear­ly this week.