Essentially, the EOSS is to the operator what the PMS is to the maintainer. The main propulsion plants in the ships of the modern day Navy are becoming more technically complex as each class of ship is built and joins the fleet.
Increased complexity requires increased engineering skills for proper operation.
Ships that lack the required experienced personnel have had material casualties which jeopardized their operational readiness. In addition, the rapid turnover of the engineering personnel who man and operate the ships further compounds the problem of developing and maintaining a high level of operator and operating efficiency. The Navy has been increasingly aware of these problems and has undertaken studies to evaluate the methods and procedures presently used in operating complex engineering plants. The results Figure 2-18. Preprinted message format.