The unarmed Naval Auxiliary Patrol boat `` Lauriana `` ( later commissioned HMAS `` Lauriana `` ) spotted `` M-21 '' and illuminated the submarine 's conning tower , while sending an alert signal to the Port War Signal Station at South Head , and the nearby anti-submarine vessel HMAS `` Yandra '' .
DET ADJ PROPN PROPN PROPN NOUN `` PROPN `` ( ADV VERB ADJ `` PROPN `` ) VERB `` NUM '' CCONJ VERB DET NOUN PART NOUN NOUN , SCONJ VERB DET ADJ NOUN ADP DET PROPN PROPN PROPN PROPN ADP PROPN PROPN , CCONJ DET ADJ ADJ NOUN PROPN `` PROPN '' .