▁at ▁Dr . ▁Ch ase ' s ▁headquarters , ▁and ▁are ▁soon ▁put ▁into ▁contact ▁with ▁Rich land . ▁Rich land ▁tells ▁Dr . ▁Ch ase ▁not ▁to ▁do ▁anything ▁until ▁he ▁arriv es . ▁Dr . ▁Ch ase ▁arg ues ▁that ▁more ▁people ▁could ▁die ▁if ▁they ▁do ▁not ▁take ▁action ▁but ▁Rich land ▁does ▁not ▁care . ▁Rich land ▁and ▁a ▁tro op ▁of ▁N AV Y ▁SE AL s ▁board ▁a ▁hel ic opter ▁and ▁set ▁off ▁for ▁the ▁island . ▁Dr . ▁Ch ase ▁ign ores ▁Rich land ' s ▁warning ▁and ▁goes ▁back ▁out ▁into ▁his ▁boat . ▁Pen ist on ▁uses ▁a ▁horn ▁to ▁attract ▁the ▁creature , ▁which ▁is ▁attract ed ▁to ▁noise . ▁The ▁creature ▁attacks ▁him , ▁but ▁Dr . ▁Ch ase ▁and ▁friends ▁save ▁him . ▁They ▁bring ▁him ▁back ▁to ▁their ▁headquarters . ▁ ▁The ▁next ▁day ▁Dr . ▁Ch ase ▁disco vers ▁cla w ▁marks ▁on ▁his ▁boat ▁( proof ▁of ▁his ▁theory ▁of ▁the ▁Great ▁White ' s ▁innoc ence ). ▁Later , ▁Pen ist on ▁shows ▁them ▁a ▁secret ▁tunnel ▁leading ▁to ▁the ▁actual ▁research ▁facility . ▁Meanwhile , ▁Rich land ▁and ▁the ▁SE AL s ▁approach ▁the ▁island ▁in ▁their ▁hel ic opter . ▁Dr . ▁Ch ase ▁and ▁Dr . ▁M acy ▁go ▁down ▁the ▁tunnel ▁and ▁discover ▁it ▁to ▁be ▁half ▁flo oded , ▁most ▁likely ▁connected ▁to ▁the ▁ocean . ▁They ▁also ▁discover ▁equipment ▁and ▁notes . ▁They ▁find ▁some ▁of ▁P uck ett '