DRAFT — waters ure most stratified (i.c., density sradients ene great-. est) at depths of 50 te 175 meters, being shoalest i the soutnhe eastern part of the srea, deepest in the northwestern percio and of intermediate depth at Bikini. Weter masses in the arca are primarily Equatorial Facific, Korth Facific Intermeciate, nd West Nerth Pacific Central. Underwater sound propagation conditions et déepthne ebcve the thermocline are food, ort will become less favoretle as summer progresses. Frovagetion in the deep vater Lc bottom limited where Ceptns ere less than LOGO fathoms. Ure aras of the deep seunsa charmnmel is 1.5 times as dees as off the U. S. West Coast). ty s teneete caine pt Abt nysical hydvogravhy of Bikini that onpteaineds at CRhOSS20A25,. j% a ah + 7. t moO A De » cmnin 4 eet legoon ts siriilaer is Surface waters move Aaccwind, as woe, . Sp Ras pS 3 ~ stean Off . s 34 > tae . 4 > re +: } ae ana~ deep waters Flow in the onnosite airection te comulare 3~ selluler circulation. Giverted bots rorth sna at the vurwind end the dean wrtems ares south into two se*csnderv lagoon along the windward reefs and Flows out chanacl and vat the leawarc reefs end cnamnete, through Enynu Whtn soaiclsily and southeasterly winis most ef the inflow occurs Shrough prwu channel, Speea cf the surface current was measured to be zbout 1.6% of the wind speed instead of 3% as previously found. The siderabiy less speed than thet obtained during previsus inves s*"gations ag the trace winds wateriszlly cecrease, tie surtnes