The purpose of the research: assessment of functional state and productivity of specialists of ship construction and existing ships while out to sea. There were researched control groups of constructing crews (19 people) and active ships (36). Control research of functional state and productivity has been made in the period after the sea, three times during the sea and in the early period after the sea. Also was used a complex of clinico-physiological, psycho-physiological and psycho-diagnostic methods. Researches have shown that when access to the sea for testing specialists commissioning crews, in contrast to the seafarers operating ships, not achieved a sustainable level of efficiency, reflecting the formation of primary adaptive reorganizations in an organism at long operating cycle. This is due to the much worse conditions of habitability of ships under construction at the stages of testing. In addition, the crews of ships under construction compared to the active marked slowing of regenerative processes in the body period after the sea. Conclusion: when going out at sea to the test the crew of the construction ships observed the difficulty of the process of early adaptation, which leads to the organism inability for many experts to achieve the phase «optimal productivity» even nearly a 3-week period of sailing, in contrast to the seafarers of operating ships.