tax...

i work for an American cruise line, the company does not require me to pay any tax to the US gov. I spend minimum 6 months abroad a year and the money is given to me cash in international waters. I am an Israeli citizen, what am i supposed to report and how? i do not work in Israel or for an Israeli entity neither do i work under the jurisdiction of another country.i usually transfer money to the bank account so i wont bring over 10000US$ with me am i in danger of tax evading? ..