Signalman 1 & C - Historic Naval Ships Association

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door is hinged, allowing access to the drum interior.The parabolic reflector is mounted on the rear door.Signaling levers on both sides of the drum open andclose the shutters to permit signaling up to 15 wordsper minute.The drum is mounted on the yoke with trunionbearings so that the light can be elevated or depressed.Locking clamps on the yoke secure the light inelevation; locking clamps beneath the mountingbracket lock the light in train.There is very little to operating this type of light.You can learn in a short time the proper procedure forturning the lamp on and off, positioning it horizontallyor vertically, and operating the shutter. Train thesearchlight directly on the receiver in daytime, but notat night, for it might blind the receiver and bridgepersonnel. At night, train the searchlight slightlyunder or above the receiver.OperationA remotely mounted rotary switch controls powerto the searchlight. To open the signaling shutters, usepressure on the signaling lever to overcome springpressure. When you release pressure on the signalinglever, the spring forces the shutters closed. Two leatherbumpers cushion the return of the signaling lever,protecting the shutter from damage.Do not keep the searchlight switched on longerthan necessary. When the searchlight is not in use, lockit in the fore-and-aft position.When the signal bridge is secured, as duringoverhaul, searchlight lay-up maintenance should beconducted according to the maintenance requirementcard (MRC); also, all tests and care and maintenanceprocedures should be performed before redeployment,to ensure proper operation. During inclement weather,place a protective canvas cover over lights not in use.MaintenanceMaintain searchlights according to current MRCs.Electrical contacts must be kept clean and bright.Electrical leads should be checked daily and replacedas soon as defects appear. Depending on the amountof time they are used, moving parts such as trunionbearings and stanchion sockets must be lubricated atintervals. Shutter vane hinges and links should belubricated once a quarter, or more frequently ifrequired. Searchlights should be operated for a fewminutes after lubrication with the door glass and coverremoved to allow the lubricant to evaporate.Screws and bolts should be checked for tightnessat regular intervals, particularly following the firing ofthe ship's guns.The two shutter stop screws should be adjusted atregular intervals to take up the wear in the leatherbumpers. The leather bumper should just touch thestop adjustment when the vanes are closed to preventtwisting.The reflector should be cleaned quarterly and/orwhen needed. Refer to your MRC for instructions oncleaning the reflector.Never paint a bearing surface or the workingmember of any part of the light. Do not paint bolts,locking nuts, or other parts accessing the interior. Donot paint over nameplates, and keep oiling cups andholes free of paint.Replacing the lamp and focusing should be doneonly by qualified Electrician's Mates unless a memberof the signal gang is qualified and authorized to do so.12-INCH MERCURY-XENON ARCSEARCHLIGHTThe mercury-xenon arc searchlight uses a1,000-watt mercury-xenon lamp. The searchlight isprovided with an automatic lamp-starting circuit.Parts consist of a drum, back dome, signalingshutter, mounting yoke, lamp, focusing device, starterbox, and ballast assembly. The automatic startingcircuit assembly is attached to the lower part of thedrum. A screening hood with various color filters issupplied.A high-voltage, pulse-type circuit is used. Whenthe searchlight is turned on, the boost transformersupplies 130 volts to the primary coil of thetransformer, which in turn provides a series of pulsesof approximately 50,000 volts generated byhigh-frequency discharges through a spark gap.When the main arc in the lamp is established, thevoltage to the primary coil of the transformer drops to65 volts. This voltage is not high enough to cause thesecondary voltage of the transformer to break downthe spark gap. Thus, the high-voltage pulse to the lampautomatically ceases.2-2
Five resistors are connected in parallel and are, inturn, connected in series with the lamp. These resistorslimit the current at starting and during operation, andsupply the correct electrical values to the lamp.12-INCH MODIFIED MERCURY-XENON SEARCHLIGHTSome of the older mercury-xenon searchlights are12-inch, incandescent lamp searchlights converted touse a 1,000-watt, compact, mercury-xenon arc lamp(fig. 2-2). The addition of a small amount of mercuryto xenon in a gaseous discharge arc lamp produces amuch more brilliant light with a great deal of radiationin the green and ultraviolet parts of the spectrum. Theincrease in light intensity greatly increases the rangeof the searchlights.The modifications made to convert the searchlightinclude the installation of a lamp holder, lamp adjusterassembly, and lamp starter assembly mounted on thesearchlight drum.Other modifications include the following:1. Providing a 115-volt, 60-Hz ballast unit to bemounted below the deck near the searchlight andconnected to it by a flexible cable.2. Installing the short-arc mercury-xenon lamp.3. Furnishing the additional onboard repair partsnecessitated by the changes. (The electrical componentsinclude a ballast, transformers, capacitors, spark gaps,and switch circuits.)Figure 2-2 .—12-inch modified mercury-xenon arc searchlight.2-3
Page 1 and 2: NONRESIDENTTRAININGCOURSEJuly 1996S
Page 3: COMMANDING OFFICERNETPDTC6490 SAUFL
Page 7 and 8: PREFACEBy enrolling in this self-st
Page 9 and 10: CONTENTSCHAPTERPAGE1. Introduction
Page 11: PASS/FAIL ASSIGNMENT PROCEDURESIf y
Page 15 and 16: CHAPTER 1INTRODUCTION TO VISUAL COM
Page 17 and 18: Phonetic AlphabetSome of the words
Page 19 and 20: SPOTTERThe spotter is the most valu
Page 21 and 22: CLASSIFICATIONCommunications Proced
Page 23: CHAPTER 2SIGNAL EQUIPMENTBefore Sig
Page 27 and 28: Because the lamp contains gas under
Page 29 and 30: Figure 2-7.—AN/SAT 2 infrared tra
Page 31 and 32: Figure 2-10.—Power conversion uni
Page 33 and 34: You were born with the finest optic
Page 35 and 36: assembly. Take care to keep lubrica
Page 38 and 39: The following steps are required to
Page 40 and 41: eye. Each eyepiece is adjustable th
Page 42 and 43: you may hear the sound of gas escap
Page 44 and 45: Figure 2-23.—Measuring and taping
Page 46 and 47: Page 2-24.Figure 2-24.—Completing
Page 48 and 49: off the remaining tail at this poin
Page 50 and 51: granted by the officer of the deck
Page 52 and 53: ADDRESS OF MESSAGEMost messages hav
Page 54 and 55: Figure 3-3.—Parts of a naval mess
Page 56 and 57: Figure 3-4.—The precedence of a m
Page 58 and 59: abbreviated service messages, the B
Page 60 and 61: Standing alone, prosign C means “
Page 62 and 63: Voice Call SignsVoice call signs ar
Page 64 and 65: Figure 3-6.—Numeral pennant call
Page 66 and 67: SHIPS' BOATS.—The following visua
Page 68 and 69: types of messages that you will be
Page 70 and 71: with other civil stations unless it
Page 72 and 73: Call SignsThe following call signs
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When required, a full answer, consi
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To request repetition of the second
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3. The aircraft should be maneuvere
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the receiving station follows suit
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SECURITYIn the interest of security
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ooks are transmitted by voice radio
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Table4-2.—Prowords—ContinuedPRO
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Table 4-2.-Prowords—ContinuedPROW
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EXECUTIVE METHODThe executive metho
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CHAPTER 5ALLIED FLAGHOIST PROCEDURE
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Figure 5-2.—Numeral pennants; spe
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More information on the hoisting of
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to the addressees or to the OTC if
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Example:If a junior commanding offi
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The SCREEN pennant is spoken, writt
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The letter N is also used for minus
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executive signal will be made by li
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CHAPTER 6INTERNATIONAL SIGNALINGIn
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Flashing light or sound signaling:
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CallingThe identity signal of the s
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These examples illustrate the conve
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Figure 6-1.—Morse signaling by ha
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5. MISCELLANEOUS6. METEOROLOGY—WE
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Figure 6-2.—Distress signals.A si
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Figure 6-3.—Lifesaving signals (p
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Figure 6-3.—Lifesaving signals (p
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signal is not hoisted to the dip; i
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CHAPTER 7CONVOY COMMUNICATIONSAltho
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Ships that pass through the MERZONE
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Figure 7-1.—Convoy formation grid
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TAKING UP FORMATIONWhen forming a c
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RADIOTELEGRAPHRadiotelegraph messag
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CHAPTER 8WATCHSTANDING DUTIESVisual
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Signalmen must be alert to respond
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where persons have fallen overboard
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Figure 8-2.—Visual communications
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Figure 8-3.—Watch-to-watch invent
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SIGNALTable 8-2.—Signals from a S
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Figure 8-4.-Vari-color signal illum
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Multipurpose LampWhen using the por
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Approach ShipThe approach ship main
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Figure 8-7.—Transfer-station mark
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CHAPTER 9NAVIGATIONAL DUTIESNavigat
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possible, then, to obtain relative
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distance on a Mercator chart, one m
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periodical announces new nautical c
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CLASS ABBREVIATION GENERAL DESCRIPT
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Sectors may be only a few degrees w
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Figure 9-12.—IALA Maritime Buoyag
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is used to describe any buoy that i
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TopmarksBy day, topmarks are the mo
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-Spoil ground marksMilitary exercis
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Head-on SituationWhen two ships mee
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Figure 9-22.—Pilot vessel, under
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Figure 9-24.—Towing vessels less
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Dredging/Underwater OperationWhen a
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Figure 9-28.—Pushing ahead or tow
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INTERNATIONALMAKING WAYINLANDMAKING
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CHAPTER 10HONORS AND CEREMONIESFrom
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When displayed with foreign ensigns
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way do not half-mast the ensign alt
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Figure 10-2.—Personal flags and c
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concerned, or the senior officer pr
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commission that has no flag officer
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BOAT HAILSBoat hails are used durin
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PresidentTable 10-4.—Passing Hono
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termination of the call, ruffles an
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Page 10-19Figure 10-5.—Personal f
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RED CROSS FLAGThe Red Cross (Geneva
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NOTEOn a flagship where the command
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Formulate and coordinate the comman
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such as “This page is unclassifie
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assigned duties. Personnel authoriz
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Precautionary measures must be take
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In setting a combination, numbers s
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have served their purposes, or are
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ehind pictures and radiators, and u
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A person about to be relieved will
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security should holdings fall into
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would be suitable for use as a seco
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These craft are capable of beaching
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CONTROL AREASLine of Departure (LOD
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station by displaying the designate
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ASSISTANT BOAT GROUPCOMMANDER (ABGC
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Figure l2-8.—Beach flags, markers
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Figure 12-9.—Standard flags and i
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a. Ships, Boats, and Landing CraftC
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In addition to megaphone, radio, an
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circle to the beach. The last 1,000
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Transmit the grid position using le
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Figure 12-16.—Arm and hand contro
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Figure 12-16.—Arm and band contro
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completed. At the end of start and
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wingspan provides the final clue fo
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Figure 13-8.—Fuselage shapesFigur
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SURFACE SHIPSThere are many types o
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Figure 13-13.—Classes of cruisers
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Figure 13-16.—Classes of frigates
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Figure 13-19.—Recognition silhoue
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Figure 13-19.—Recognition silhoue
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Figure 13-22.—Modern submarine.on
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Figure 13-24.—Sail placementFigur
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Figure 13-26.—Appearance groups.T
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Deckhouses are not raised. An islan
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Figure 13-32.—Types of king posts
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Figure 13-35.—Types of funnels.Fi
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CHAPTER 14TECHNICAL ADMINISTRATIONV
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the text on a page and improper cla
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From: Communications OfficerTo: All
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APPENDIX IGLOSSARYABEAM—Bearing 9
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PRECEDENCE—The relative order in
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Figure AII-1.—Formation of charac
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Drill 6This exercise contains all t
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Figure AII-2.—Semaphore alphabet
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Drill 2Practice sending and receivi
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APPENDIX IIIREFERENCE LISTChapter 1
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Replenishment at Sea, NWP 14, Chief
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Clearances, 11-4access, 11-6eligibi
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Flashing light procedure—Continue
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Radiotelephone—Continuedgeneral p
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Assignment QuestionsInformation: Th
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1-12. The multipurpose light is des
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1-40. What does an overscore over a
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1-65.1-66.1-67.1-68.1-69.1-70.In vi
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2-13. By which of the following mea
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2-40.2-41.2-42.2-43.What maneuver f
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2-66. What signals are reserved for
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3-12.3-13.3-14.3-15.3-16.3-17.You a
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3-38. What term denotes the positio
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3-63. You observe the following lig
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4-11.4-12.4-13.Your ship is receivi
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4-37.4-38.4-39.4-40.4-41.4-42.The O
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4-64.4-65.Grades assigned to exerci
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Signalman 1 & C - Historic Naval Ships Association

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