There is no report on the whole of communication among seafares in a navigation bridge although it is one of the most important factor in BRM. In this paper, charactaristics of communication are investigated based on thousands of discussion records by trainees and instructors after simulation exercises of BRM training.

 First, the authors show the communication errors in a navigation bridge can be categorized into 24 elements, in which 7 elements relate to the quality of information to be communicated and remaining 17 ones relate to the failure of transmission. The data from the discussion records are analyzed by Principal Component Analysis ; it is shown that the degree of seafare’s interest in each communication category is corresponding to the first principal component and difficulty on carring out communication is corresponding to the second one.

 It is clarified that there is little correlation between the defference in types of simulation scenario and analysis results and the trainees give their mind to the matter on the failure of transmission rather than the quality of information except “ambiguity” and “obscurity”.

 Painting is an indispensable work to prevent a hull from corrosion and keep the fine appearance. To carry out the effective and safe work the roles of a work manager are important as well as painting skills of a crew member. In this paper, knowledge and skills required for the painting of onboard maintenance are specified in the course of investigation of them the manager must acquire; the authors propose the standards of the knowledge and skills, which are obtained by literature surveys and examining characteristic onboard works to be related.

 The obtained results are arranged in a table, which shows the relation between the above-mentioned knowledge and skills and requirements of STCW Code Section A-II/5. The table is expected to be used as a fundamental data to investigate whether the painting plan made by a boatswain is appropriate because seafarer’s skill levels can be understood.