RESULTS. 
THUS FAR SIX METERS HAVE BEEN INSTALLED AND 
HAVE GIVZN RECORDS FOR SOME TIME. ONE FAILED AFTER 
SEVERAL DAYS, BY DEVELOPMENT OF A SHORT UNDER 2000 Fs 
OF WATER, AFTER RETURNING A SHORT SEQUENCE OF CURRENT 
SPEEDS. ‘um 750 FM UNIT WAS INTENDED TO GIVE SPEED 
AND DIRECTION, BUT THE SPEED SENSOR FAILED TO OPERATE 
AND ONLY RELATIVE DIRECTION WAS OBTAINED. JHE RECORD 
CEASED WHEN AN ATTEMPT WAS MADE TO RECOVER THE INSTRU-= 
MENT FOR REPAIR. JHE REST OF THE UNITS GAVE SPEED 
SIGNALS FOR PERIODS UP TO TWO MONTHS, AND ALL FAILED 
BY CABLE BREAKS AT THE Ancus IsLAND END EXCEPT THE 
21 FM UNIT WHICH, PREDICTABLY, FOULED AFTER ABOUT TWO 
WEEKS OF OPERATION. JT IS INTERESTING TO NOTE THAT 
ONE OF THE CABLES WAS PROBABLY BROKEN BY A MIGRATING 
HUMPBACK WHALE AT THE POINT WHERE IT EXTENDED FROM THE 
TOWER TO THE SEA-FLOOR IN A BIG CATENARY. 
Qn rHiIs sAtz DANK, ONE INCH STEEL BUOY CHAIN 
HAS PARTED ON A NUMBER OF OCCASIONS DURING STORMS, AND 
EXPANDED MESH PLATFORMS HAVE BEEN CURLED UP AND 
CARRIED AWAY BY STORMS, CABLE TERMINATION HAS THERE- 
FORE PRESENTED A PROBLEM, BUT IN SPITE OF THE RELA- 
TIVELY SHORT CABLE LIFE OF THE SEVERAL UNITS, PROPER 
SHORE TERMINATION OF FUTURE CABLES IS EXPECTED TO IN- 
CREASE LIFE BY A FACTOR OF IO OR MORE. 
216 
