The minimum instrumentation, alarms, and safety controls required for specific types of systems are listed in Table 62.35-50.
Table 62.35-50—Minimum System Monitoring and Safety Control Requirements for Specific Systems (Note 1)
| System | Service | Instrumentation | Alarm | Safety control | Notes |
|---|---|---|---|---|---|
| Main (Propulsion) boiler | (1) | (1) | (1) | (2) | |
| Supply casing and uptakes | Fire | ||||
| Burner flame | Status | Failure | Burner auto trip | (3) | |
| Burner seating | Failure | ......ditto | (3) | ||
| Trial for ignition | Status | Failure | ......ditto | ||
| Control power | Available (pressure) | Failure (low) | ......ditto | (3) | |
| Manual trip | (3) | ||||
| Burner valve | Open/closed | ||||
| Low fire interlock | Status | ||||
| Program control interlock | Status | ||||
| Main (Propulsion steam) turbine | (2) | (2) | (2) | (4, 5) | |
| Manual trip | |||||
| Main propulsion, diesel | (1) | (1) | (1) | (4, 5) | |
| Manual trip | |||||
| Main propulsion, remote control | Failure | ......ditto | |||
| Auto safety trip override | Activated | ||||
| Starting power | Pressure (voltage) | Low | Limit | (2) | |
| Location in control | Status | Override | (6) | ||
| Shaft speed/direction/pitch | (3) | (3) | (3) | ||
| Clutch fluid | Pressure | Low | |||
| Main propulsion, electric | (4) | (4) | (4) | (4) | (7) |
| 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 | (1) | (1) | ||
| Starting pressure/voltage | Low | ||||
| Tripped | |||||
| Emergency | (5) | (5) | (5) | ||
| Turbogenerator | (1 6) | (1 6) | (6) | ||
| Manual trip | |||||
| Diesel | (1 7) | (1 7) | (7) | (5) | |
| Manual trip | |||||
| Auxiliary boiler | Run | Trip | (12) | ||
| Gas turbine | (8) | (8) | (8) | (8) | (5) |
| Engines and turbines | Jacking/turning gear | Engaged | (8) | ||
| Fuel oil | (9) | (9) | (9) | ||
| 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 CL.3 W.T. doors | Open/closed | ||||
| Fire detection | Machinery spaces | Space on fire | (9) | ||
| Fire main | Pressure | Low | |||
| Personnel | Deadman | Fail to acknowledge | (10) | ||
| General, control and alarm systems | Power supply | Available (pressure) | Failure (low) | ||
| System function | Failure | (11) | |||
| Console air conditioning | Failure | ||||
| Built in test equipment | Active | ||||
| Sequential interlock | Activated | ||||
| Safety control | Activated | Auto trip/limit | (11) | ||
| Redundant auxiliary, system, power supply | Status | Auto transfer |
1See the ABS Steel Vessel Rules (incorporated by reference; see 46 CFR 62.05-1) Part 4-9-4, tables 7A and 8.
2See ABS Steel Vessel Rules Part 4-9-4, tables 7A and 8.
3See §113.37 of this chapter.
4See subparts 111.33 and 111.35 of this chapter.
5See subparts 112.45 and 112.50 of this chapter.
6See §111.12-1(c) of this chapter.
7See §111.12-1 (b), (c) of this chapter.
8See ABS Steel Vessel Rules Part 4-9-4, Table 8; and 46 CFR 58.10-15(f).
9See ABS Steel Vessel Rules Part 4-9-4, tables 7A and 8.
Notes on Table 62.35-50:
1. The monitoring and controls listed in this table are applicable if the system listed is provided or required.
2. Safety limit controls must be provided in navigating bridge primary propulsion control systems. See §62.35-5(c).
3. Safety trip controls and alarms must be provided for all main boilers, regardless of mode of operation. See §62.35-20(a).
4. Loss of forced lubrication safety trip controls must be provided, as applicable.
5. Override of overspeed and loss of forced lubrication pressure safety trip controls must not be provided. See §62.35-5(e)(2).
6. Transfer interlocks must be provided.
7. Semiconductor controlled rectifiers must have current limit controls.
8. Interlocks must be provided. See §62.25-5(a).
9. 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.
10. See §62.50-20(b)(1).
11. Alarms and controls must be failsafe. See §62.30-1.
12. Vital auxiliary boilers only. Also see part 63.
[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988, as amended by USCG-2000-7790, 65 FR 58461, Sept. 29, 2000; USCG-2003-16630, 73 FR 65190, Oct. 31, 2008]
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