In an approved simulator or aboard a ship underway, given access to a main steam turbine.

Performance requirement

Behavior Standard
The student will: During assessment, the student shall, at a minimum:

Identify turbine instrumentation available at console

Identify these items:

  • lube oil pressure gage
  • lube oil gravity tank bull’s eye
  • main condenser vacuum gage
  • gland sealing pressure gage
  • main steam pressure gage and thermometer
  • ahead and astern steam chest pressure gage

Monitor turbine and reduction gears while underway

Monitor for at least one hour

Monitor these items:

  • turbine and gear bearings
  • clearance indicators
  • oil sight-flow indicators
  • lp turbine casing temperature

Monitor turbine exhaust system

Monitor these items:

  • hotwell level
  • dc heater level
  • condensate pump operation
  • main circulating pump
  • main condenser vacuum

Monitor the turbine lubrication system

Monitor these items

  • main lube oil sump
  • main and standby lube oil pumps
  • main lube oil coolers

Operate lube oil cooler

Maintain temperature at 110° F.

State normal operating temperature range

State critical temperature limits (40° F rise or 160° F max.)


Assessed in EN‑3233 Steam and Gas Turbines.


  1. Table A-III/1 OICEW-A4.3
  2. NVIC 17-14 Task 4.2.C

See the Assessment Guidelines for additional specifications of behavior and standards.