At 07 : 30 , the contact was sighted through the high periscope , but it proved too distant .
At 06 : 15 on 24 October , Shark reported a contact , and Seadragon headed for the scene .
At 07 : 30 , the contact was sighted through the high periscope , but Seadragon proved too distant .
At 06 : 15 on 24 October , Shark reported a contact , and Seadragon headed for the scene .