PSA International The Professional Scuba Association Since 1962 Safety Integrity Knowledge

#Earth, terrestrial globes, planets #Flags #Triangles, lines forming an angle #Letters or numerals forming geometrical figures, written or typographical matter in perspective #Letters presenting a special form of writing #Numerals presenting a special form of writing #Colours #Parts of terrestrial globes #One flag #Stylized flags #One triangle #Triangles containing one or more letters #Letters or numerals forming a figure in the shape of an arc of a circle #Letters written in double outline #Letters in relief or shaded #Letters linked to a figurative element #Series of letters presenting different forms of writing #Series of letters in different dimensions #Five colours and over