Thaum muaj kev puas tsuaj ntuj tsim los yog muaj xwm txheej ceev, tsoomfwv cov nkoj tuaj yeem xa mus sai sai rau cov haujlwm cawm thaum muaj xwm txheej ceev. Thaum dej nyab, cov dej nce nrawm, ua rau ntau qhov chaw thiab ua rau cov neeg nyob hauv lub neej. Cov neeg ua haujlwm cawm neeg taug kev hauv tsoomfwv cov nkoj hla cov chaw cuam tshuam, tshawb nrhiav cov neeg raug kaw thiab xa lawv mus rau kev nyab xeeb. Kev txav mus los ntawm tsoomfwv cov nkoj tso cai rau cov neeg cawm siav mus txog thaj chaw uas tsis tuaj yeem siv tau los ntawm tsheb, txhim kho kev cawm dim zoo heev.
Thaum muaj xwm txheej hauv hiav txwv, tsoomfwv cov nkoj tseem yog lub zog cawm siav tseem ceeb. Lawv tuaj yeem ncav cuag qhov xwm txheej ntawm qhov xwm txheej ceev, muab cov nkoj muaj kev ntxhov siab nrog cov khoom siv tsim nyog xws li zaub mov, dej haus, thiab thawj - tshuaj pab. Lawv kuj pab khiav tawm thiab hloov cov neeg ua haujlwm raug mob, thauj lawv mus rau cov chaw kho mob onshore rau kev kho mob.
Tsis tas li ntawd, thaum muaj hluav taws kub hauv hav zoov, yog tias thaj chaw hluav taws kub nyob ze dej, tsoomfwv cov nkoj tuaj yeem siv lawv txoj kev yooj yim rau cov dej thauj mus rau thaj tsam ntawm qhov chaw tua hluav taws, muab cov dej txhawb nqa rau kev tua hluav taws thiab pab pawg tua hluav taws los tswj kev sib kis ntawm hluav taws.