46 CFR 62.35-50: -50 Tabulated monitoring and safety control requirements for specific systems.

The minimum instrumentation, alarms, and safety controls required for specific types of systems are listed in table 1 to § 62.35-50. The ABS Marine Vessel Rules (incorporated by reference; see § 62.05-2) required for engineering systems are also listed in table 1 to § 62.35-50.

(a) Safety limit controls must be provided in navigating bridge primary propulsion control systems. See § 62.35-5(c).

(b) Safety trip controls and alarms must be provided for all main boilers, regardless of mode of operation. See § 62.35-20(a).

(c) Loss of forced lubrication safety trip controls must be provided for main propulsion turbines and main propulsion diesel engines.

(d) Override of overspeed and loss of forced lubrication pressure safety trip controls must not be provided for main propulsion or generator steam or gas turbines, or diesel engines. See § 62.35-5(e)(2).

(e) Transfer interlocks must be provided for main propulsion systems capable of remote and local control.

(f) Semiconductor controlled rectifiers must have current limit controls.

(g) Interlocks must be provided to prevent the starting of engines or turbines while the jacking or turning gear, if installed, is engaged. See § 62.25-5(a).

(h) Main and remote-control stations, including the navigational bridge, must provide visual and audible alarms in the event of a fire in the main machinery space.

(i) Minimally attended and periodically unattended machinery plants must be provided with a personnel alarm that annunciates on the bridge if not acknowledged by the watch engineer. See § 62.50-20(b)(1).

(j) All automatic controls and alarms must be failsafe to the least critical consequence for the particular system. See § 62.30-1.

(k) The operating or tripped status of vital auxiliary boilers must be indicated at the ECC. See part 63 of this subchapter.

Table 1 to § 62.35-50—Minimum System Monitoring and Safety Control Requirements for Specific Systems

System Service Instrumentation Alarm Safety control See also paragraph

Main (Propulsion) boiler ABS Marine Vessel Rules Part 4-9-6 tables 1A, 1B and 5A ABS Marine Vessel Rules Part 4-9-6 tables 1A, 1B and 5A ABS Marine Vessel Rules Part 4-9-6 tables 1A, 1B and 5A (a)

Burner seating Failure Burner auto trip (b)

Trial for ignition Status Failure Burner auto trip (b)

Manual trip (b)

Low fire interlock Status

Program control interlock Status

Main (Propulsion steam) turbine ABS Marine Vessel Rules Part 4-9-6 table 2 ABS Marine Vessel Rules Part 4-9-6 table 2 ABS Marine Vessel Rules Part 4-9-6 table 2 Manual trip (c), (d)

Main propulsion, diesel ABS Marine Vessel Rules Part 4-9-6 tables 1A, 1B and 5A ABS Marine Vessel Rules Part 4-9-6 tables 1A, 1B and 5A ABS Marine Vessel Rules Part 4-9-6 tables 1A, 1B and 5A Manual trip (c), (d)

Main propulsion, remote control Failure Manual trip

Auto safety trip override Activated

Starting power Pressure (voltage) Low Limit (a)

Location in control Status Override (c)

Shaft speed/direction/pitch See § 113.37 of this chapter. See § 113.37 of this chapter. See § 113.37 of this chapter.

Clutch fluid Pressure Low

Main propulsion, electric (1) ABS Marine Vessel Rules Part 4-9-6, tables 4A and 4B ABS Marine Vessel Rules Part 4-9-6, tables 4A and 4B ABS Marine Vessel Rules Part 4-9-6, tables 4A and 4B ABS Marine Vessel Rules Part 4-9-6, tables 4A and 4B (f)

Main propulsion, shafting Stern tube oil tank level Low

Line shaft bearing Temperature High

Forced lubrication Pressure Low

Main propulsion, controllable pitch propeller Hydraulic oil Pressure High, Low

Temperature High

Generators Ship service ABS Marine Vessel Rules Part 4-9-6, table 6 ABS Marine Vessel Rules Part 4-9-6, table 6

Starting pressure/voltage Low

Tripped

Emergency 2

Turbogenerator ABS Marine Vessel Rules Part 4-9-6, table 6 ABS Marine Vessel Rules Part 4-9-6, table 6 ABS Marine Vessel Rules Part 4-9-6, table 6

Manual trip

Diesel ABS Marine Vessel Rules Part 4-9-6, table 6 ABS Marine Vessel Rules Part 4-9-6, table 6 ABS Marine Vessel Rules Part 4-9-6, table 6 (d)

Manual trip

Auxiliary boiler Run Trip (k)

Gas turbine 3 ABS Marine Vessel Rules Part 4-9-6, Tables 3 and 6 ABS Marine Vessel Rules Part 4-9-6, Tables 3 and 6 ABS Marine Vessel Rules Part 4-9-6, Tables 3 and 6 ABS Marine Vessel Rules Part 4-9-6, Tables 3 and 6 (d)

Engines and turbines Jacking/turning gear Engaged (g)

Fuel oil ABS Marine Vessel Rules Part 4-9-6, tables 5A and 6 ABS Marine Vessel Rules Part 4-9-6, tables 5A and 6 ABS Marine Vessel Rules Part 4-9-6, tables 5A and 6

Remote/auto fill level High Auto trip or overflow arrangement

Hi. press. leakage level High

Bilge Pump remote control Run

Pump auto control Run Excessive operations

Level High/location

Machinery space Class 3 (power-operated) watertight doors Open/closed

Fire detection Machinery spaces Space on fire (h)

Fire main Pressure Low

Personnel Deadman Fail to acknowledge (i)

General, control and alarm systems Power supply Available (pressure) Failure (low)

System function Failure (j)

Console air conditioning Failure

Built in test equipment Active

Sequential interlock Activated

Safety control Activated Auto trip/limit (j)

Redundant auxiliary, system, power supply Status Auto transfer

1 See subparts 111.33 and 111.35 of this chapter.

2 See subparts 112.45 and 112.50 of this chapter.

3 See § 58.10-15(f) of this subchapter.