This course is designed to train persons who have been nominated by their line manager/sponsor to enable them to attain the Controller of Site Safety (COSS) competence. The COSS competence is required to be held by anyone who is required to set up a safe system of work on or near the line for a group(two or more). A COSS can also carry out the duties of an IWA provided there are no medical restrictions that would prevent this. The COSS course will take delegates through the procedures as set out in the Rule Book; Handbook 6 (General Duties of an IWA), Handbook 7 (General duties of a controller of site safety (COSS), Handbook 8 (IWA,COSS or PC blocking a line), Handbook 9 (IWA or COSS setting up safe systems of work within possessions), Handbook 10 (Duties of the COSS and person in charge of a hand trolley) and Handbook 13 (Duties ofthe person in charge of the siding). The course includes the importance of using the correct communication protocols and adopting the appropriate behaviours to be able to carry out this role safely and effectively.