The youngest son of Sarah and Ephraim. He was born on July 9, 1909 in Jaffa. During the First World War, the family was deported to Egypt, and at the end it returned to Tel Aviv. Katriel attended the “Tachkemoni” high school, the Herzliya high school and the Mikveh Israel agricultural school. After graduating, he left with a group of senior members of Mikve Israel to work in Hadera and the government nursery in Beit Shean. Afterward he joined Kibbutz Afikim and worked in Falah and Shish in the Sea of Galilee. “Katriel knew both the professions, the swimming and the sailing, and also tried to give them to us … After a short period, he made a boat for himself on the Sea of Galilee, where he spent nights and days, touring the Sea of Galilee, raising sails, … after work and on Saturdays sailing his friends around the Sea of Galilee. ” In 1932, Katriel returned to his parents’ home in Tel Aviv. Where he was a sailor on the Yarkon as a member of the “marine section” of “HaPoel”, devoted himself to the sea sport and guided many youth in this sport and blessed them with love of the sea. In 1934 he was called to go abroad to organize illegal immigrant ships. He volunteered to be one of the escorts on the ship “Velos”, whose first voyage succeeded in bringing about 350 men and women to the shores of the country. On the second voyage, British warships followed her and prevented her from reaching the shore. For several days, Velos wandered around the coast without food and water, but failed to fulfill her mission and to remove the Ma’apilim. The young Katriel saw this as a personal failure. When the 1936 riots erupted, Katriel organized the defense of the Maccabi neighborhood in Tel Aviv. That same year, the pier began to be built at the Tel Aviv port, and Katariel was one of its first employees. The motor boats that brought the Seleucid sailors to unload the Hamlet were the boats of the “marine section”. One of them was under Katriel’s command. He was in charge of the first boat of the Hapoel, which sailed to Port Said. In 1937 he was recruited for Tiger Hill activities on 1457 of its immigrants, after transporting 658 Ma’apilim from the ship “Prosola” to the “Tiger Hill.” After the ship was attacked by shots from the coastal guard, it managed to bring it to the Tel Aviv beach, but most of its passengers were caught by the British police and sent to the detention camp in Tsrifin. In all the stages of the ship’s hardships, the non-Jewish sailors also enjoyed the admiration of one of his friends: “Kissing and embracing them with Ktriel had no limit, with the addition of the words ‘Danny Capitana’ (‘Dan’). , Smiling, and wiping the glasses of his glasses that were covered in the fog of the night on Tel Aviv’s beach … “. From the beginning of the Second World War he served as a guide for sea craft and enlistment to the British Army. Often absent from home, and his elderly parents, wife, and little daughter, they learned to be quiet and patient partners to his actions. At the beginning of May 1941, Katriel was appointed commander of the naval course that trained the young group of 23 to set out by sea to blow up the oil refineries in Tripoli, Lebanon, for example: “The early maneuvers at sea, Our sailors. They met in the dark at the Lev of the sea, at a predetermined place, at exactly the appointed hour and at the fixed moment. “On May 18, 1941, the 23rd and Ktiel took part in the motorboat” Ari the Sea “at their destination, joined by a British officer, Anthony Palmer, at noon on the same day, What is the last message. There have been many hypotheses about what has happened since then, but nothing has been revealed and the circumstances of their absence. Are still unknown. Katriel left a wife and daughter. A few months after his departure in the boat, he had a son named Dan, called Katriel on the immigrant ships. A book for officers in Acre was named after “23 Yordei Hasira.”