w;iit:r. fosb)g faK1 iii deep w.ik'i and 

 slow ill shallow water The ivhvssiil 

 plains between New Zealand and 

 ii.miiuI .southern Tasmania arc around 



n.ooon deep which eorfespouds to 



a lido waved rout speed of U1O m.p.h. 

 Bass Sirait On Itic oihei hand is about 

 200 ft, deep. ShfclYiflg down wi s 

 sharply to the east. I'or ihis depth 

 ol water the tide wave-lronl Spied 

 i n i educed to about 50 m.p.h. 



I he gGOgrapbiC&l distances along 

 t hi- abyssal plains south of Tasmania 

 are such lhal ihe tidal wa\e ftOJM 

 tttlVellJdJ thai way and delleeied 

 round by Ihe presence ol lasmania 

 would reach the western end ol 

 Bass Strait at approximately Ihe same 

 time as the northerly w ave I rum 

 would reach the eastern entrance ol 

 Bass Strait. This latter wave-front 

 has been greatly reduced in speed 



Mine [Ciivtrtg the abyssal plain dn j 

 I ravelling over the shallow w aters 01 

 the continental shelf. However becaUa 

 of the delleclion of the SOUlhej* 

 wave-front by lasmania, ihcse two 



waves would he Havciiing m oppose 



dneelions. 



The Hiilimwry wtne theory 



Based on the above eonsidi raiioi 

 it can be postulated that the 114 



wave-front entering Hass Strati tnin 



ihe easl and another liile wave-froty 

 entering from the western end wouk: 

 iiileifeie with each otlli'i and form 

 a slalionaiv wave. I his would h, 

 directly imalojioiis to two simpli 

 harmonic millions ol equal amplimd. 



and frequency travelling in opposu, 



directions This is the most siinpl; 

 was ol explaining Ihe observed equal 

 ' occur commonl; 



TABLE H_ BASS STRAIT- Day licrM Tides Jun/iul. 197.1 



150 V.ci Nal Vol 88 



