Auxiliary Systems

Question 1

How many A/C plants are onboard Momsen and where are they located?

Answer 1

[5]
1A and 1 A/C (AUX 1)
2 and 3 A/C (AUX 2)
4 A/C (Shaft Alley)

Question 2

Who manufactured the A/C plants?

Answer 2

Manufactured by York

200 ton units

Question 3

How many refrigeration units does Momsen have?

Answer 3

[2] 1.5 ton units manufactured by York

Question 4

What type of refrigerant does it use?

Answer 4

R134A

Question 5

How many chill water pumps do we have?

Answer 5

[5] One per A/C

AAS - AUX 1, AUX 2, Shaft Alley

Question 6

How many cooling skids do we have?

Answer 6

[3]
SONAR (AUX 1 Lower Level)
C&D (AUX 1 Upper Level)
SPY (Located by the sonar dome)

Question 7

How many seawater service pumps do we have and how much water do they provide?

Answer 7

[5] 1575 GPM @ 35 psi

Question 8

What are the locations of the seawater service pumps?

Answer 8

AMAMS

AUX 1
Main 1
Aux 2
Main 2
Shaft Alley

A manatee

Question 9

What do the seawater service pumps provide?

Answer 9

Provides cooling for:
Lube oil cooler
A/C condenser
LPAC
Reefer plants

Question 10

How many fire pumps do we have and how much water can they provide?

Answer 10

[6] 1000 GPM x 150 psi

Question 11

What are the locations of the fire pumps?

Answer 11

FAMMS3

FWD VCHT
AUX 1
Main 1
Main 2 
Shaft Alley
3 Gen

Question 12

Where/what do the fire pumps provide water for?

Answer 12

Firefighting
R/O units
AFFF stations FWD and AFT
Cooling the steering hydraulic oil

Question 13

How many potable water tanks do we have and what are their max capacities?

Answer 13

[4]
15,711 gallons
Per tank - holds approx. 4,000 gallons

Question 14

Where are the potable water tanks located?

Answer 14

Two tanks on either side of AUX 1

Question 15

Capacity for water consumption/distribution?

Answer 15

35 gallons per person / 1 gallon - drinking per person

Question 16

How many RO (reverse osmosis) units do we have?

Answer 16

[2] Main 1 - Mid level

Question 17

How much water do the RO units produce?

Answer 17

12,000 gallons per day, 500 gallons per hour

Question 18

What skids are the RO units on? [3]

Answer 18

Filter - electric heater, centrifugal separator, 20 & 3 micron filter, and activated carbon filter

HP Pump - HP Pump, Pump driver mother, V-belt drive and an accumulator

RO Module - RO Modules, dump, valves, flow meters, pressure reducing coils, bypass valves

Question 19

How many RODM (Reverse Osmosis DeMineralizer)s do we have and where is it located?

Answer 19

[1] AUX 1 Upper level

Question 20

How much water do the RODMs produce?

Answer 20

18-22 gallons of potable water are produced for every 100 gallons of seawater

Question 21

What is the demineralized water used for?

Answer 21

Gas turbine water wash
Electronic cooling water skid
SPY polish

Question 22

How many hot water heaters do we have?

Answer 22

[3]

Question 23

Where are the hot water heaters located and what does each provide?

Answer 23

Main 1 Mid level by the ROs (2)
- used for crew galley, showers, and sinks

Outside filter cleaning shop (1)
- used for wardroom galley, showers, and sinks

Question 24

What are the VCHT locations?

Answer 24

FWD pump room
Shaft alley

One tank in each location
- holds 490 gallons of black water (sewage)

Question 25

What are the three modes of VCHT?

Answer 25

At sea: sewage is collected and then pumped over the side

Inport: sewage is collected and then pumped to the pier

In-transit: Sewage is collected and held in the tanks. This mode is used during sea and anchor and when the ship is less than 3 miles from land

Question 26

What is HALONs chemical composition?

Answer 26

11 C
32 F
1 Cl
11 Br

Question 27

What is HALON used for?

Answer 27

Extinguishing agent for a BRAVO fire in the module

- HALON 1301 / 5 lb CO2 activation

Question 28

Where is the OWS (Oil Water Separator) located and what does it do?

Answer 28

Located in AUX 2

Used to separate water from oil, clean water goes over the side into the ocean. Oil left over stays in a waste oil holding tank until the ship returns to port where it is pumped to a shore facility.

Question 29

What are the Main Drainage Eductors used for and where are they located?

Answer 29

Used to dewater engineering spaces

Located in:
AUX 1
Main 1
Main 2

Question 30

What are the five modes of steering?

Answer 30

Computer assisted auto - gyro/rudder inputs to maintain course

Computer assisted manual - Operator uses the Manual Steering Wheel Assembly (MSWA)

Backup manual - All steering commands are transmitted to each individual LCU by hard wire connections

Emergency - Operator controls the rudder via a helm order control knob on the LCU (AFT steering only)

Emergency manual - One rudder is moved at a time using an electric or hand pump (AFT Steering)