249:
control mode, the bridge handle directly controls the engine set point. When in Engine
Control Room mode the bridge handle sends a telegraph signal to the ECR and the ECR handle controls the set point of the control system. In local control, the remote control system is inactive and the bridge handle sends a telegraph signal to the local control position and the engine is operated by its manual controls in the engine room.
142:
236:
in the engine room in the event that the remote control system should fail. The EOT is required to be electrically isolated from the remote control system. However, it may be mechanically linked to the main control handle, allowing telegraph orders to be given using the same user interface as for remote control orders. Traditional EOTs (though in a more modern form) can still be found on all
258:
45:
284:
220:
235:
as a remote control device rather than an EOT, though it is still often referred to by the traditional name. This is somewhat confusing, as the classification society rules for merchant ships still in fact require an EOT to be provided, to allow orders to be transmitted to the local control position
248:
Remote control systems on modern ships usually have a control transfer system allowing control to be transferred between locations. Remote control is usually possible from two locations: the bridge and the Engine
Control Room (ECR). Some ships lack a remote control handle in the ECR. When in bridge
198:
Traditional EOTs required a pilot wanting to change speed to "ring" the telegraph on the bridge, moving the handle to a different position on the dial. This would ring a bell in the engine room and move their pointer to the position on the dial selected by the bridge. The engineers hear the bell
274:
sounds at both ends. Accordingly, the watch-keeping engineer acknowledges the order by moving the handle of the engine room EOT to the required position and takes necessary action. This sends an electrical signal to the bridge EOT unit, causing its pointer to acquire the respective position. The
185:
In its original form, from the 19th century until about 1950, the device usually consisted of a round dial about 9 inches (230 mm) in diameter with a knob at the center attached to one or more handles, and an indicator pointer on the face of the dial. There would also be a
244:
as they still require an engineering crew member to operate the throttles for the steam turbines that drive the propellers. EOTs can also be found on older vessels that lack remote control technology, particularly those with conventional steam engines.
206:
For urgent orders requiring rapid acceleration, the handle is moved three times so that the engine room bell is rung three times. This is called a "cavitate bell" because the rapid acceleration of the ship's propeller will cause the water around it to
265:
At least two telegraph units and alarms must be installed, one on the bridge and one in the engine room. The order is given by moving the bridge unit's handle to the desired position on the dial face. This sends an
199:
and move their handle to the same position to signal their acknowledgment of the order, and adjust the engine speed accordingly. Such an order is called a "bell"; for example, the order for a ship's maximum speed,
223:
Modern engine room telegraph/remote control handle in Engine
Control Room (ECR) on board a merchant ship. ECR Lever is not currently active as the system pictured is in direct bridge control mode.
62:
211:, causing a lot of noise and wear on the propellers. Such noise is undesirable during conflicts because it can give away a vessel's position.
227:
On most modern vessels with direct combustion engines or electric propulsors, the main control handle on the bridge acts as a direct
109:
128:
81:
270:
to the EOT placed in the engine room whose pointer acquires a position according to the signal given from the bridge. An audible
190:(RPM) indicator, worked by a hand crank. Modern EOTs on vessels which still use them use electronic light and sound signals.
88:
472:
66:
95:
33:
77:
55:
237:
477:
414:
342:
232:
187:
345:
order, giving the precise engine speed desired. Many modern ships have the following dial indications:
102:
441:
267:
241:
141:
231:
with no intervening engine room personnel. As such, it is regarded under the rules of
466:
170:
389:
287:
257:
200:
174:
44:
208:
166:
380:"Finished with engines" and "standby" conveyed via separate control panel.
394:
275:
alarm stops ringing to acknowledge that the order has been carried out.
228:
283:
219:
17:
418:
282:
271:
256:
218:
140:
162:
38:
349:
Full ahead navigation (on notice to increase or reduce)
297:
Many past ships have the following dial indications:
69:. Unsourced material may be challenged and removed.
177:to power the vessel at a certain desired speed.
32:"Chadburn" redirects here. For other uses, see
8:
341:Any orders could also be accompanied by an
129:Learn how and when to remove this message
415:"The Chadburn Ships' Telegraph Society"
406:
161:, is a communications device used on a
261:Block diagram of the EOT signal system
440:Halpern, Samuel (18 September 2007).
7:
301:Flank ahead (1940–present) (US only)
67:adding citations to reliable sources
27:Communications device used on a ship
215:Compared to remote control throttle
25:
293:'s bridge engine order telegraph
43:
337:Emergency astern (1940–present)
233:marine classification societies
54:needs additional citations for
1:
203:, is called a "flank bell".
494:
322:Finished with main engines
173:to order engineers in the
31:
157:, also referred to as a
78:"Engine order telegraph"
442:"Speed and Revolutions"
169:) for the pilot on the
294:
279:Typical dial positions
262:
224:
188:revolutions per minute
151:engine order telegraph
146:
145:Engine order telegraph
473:Watercraft components
446:Encyclopedia Titanica
286:
260:
238:nuclear powered ships
222:
144:
63:improve this article
421:on 27 November 2021
295:
263:
253:Order transmission
225:
147:
268:electrical signal
139:
138:
131:
113:
16:(Redirected from
485:
457:
456:
454:
452:
437:
431:
430:
428:
426:
417:. Archived from
411:
367:Dead slow astern
325:Dead slow astern
134:
127:
123:
120:
114:
112:
71:
47:
39:
21:
493:
492:
488:
487:
486:
484:
483:
482:
478:Control devices
463:
462:
461:
460:
450:
448:
439:
438:
434:
424:
422:
413:
412:
408:
403:
386:
361:Dead slow ahead
313:Dead slow ahead
281:
255:
217:
196:
183:
135:
124:
118:
115:
72:
70:
60:
48:
37:
28:
23:
22:
15:
12:
11:
5:
491:
489:
481:
480:
475:
465:
464:
459:
458:
432:
405:
404:
402:
399:
398:
397:
392:
385:
382:
378:
377:
374:
371:
368:
365:
362:
359:
356:
353:
350:
339:
338:
335:
332:
329:
326:
323:
320:
317:
314:
311:
308:
305:
302:
280:
277:
254:
251:
216:
213:
195:
192:
182:
179:
137:
136:
51:
49:
42:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
490:
479:
476:
474:
471:
470:
468:
447:
443:
436:
433:
420:
416:
410:
407:
400:
396:
393:
391:
388:
387:
383:
381:
375:
372:
369:
366:
363:
360:
357:
354:
351:
348:
347:
346:
344:
336:
333:
330:
327:
324:
321:
318:
315:
312:
309:
306:
303:
300:
299:
298:
292:
291:
285:
278:
276:
273:
269:
259:
252:
250:
246:
243:
239:
234:
230:
221:
214:
212:
210:
204:
202:
193:
191:
189:
180:
178:
176:
172:
168:
164:
160:
156:
152:
143:
133:
130:
122:
111:
108:
104:
101:
97:
94:
90:
87:
83:
80: –
79:
75:
74:Find sources:
68:
64:
58:
57:
52:This article
50:
46:
41:
40:
35:
30:
19:
449:. Retrieved
445:
435:
423:. Retrieved
419:the original
409:
379:
340:
296:
289:
264:
247:
226:
205:
197:
184:
181:Construction
158:
154:
150:
148:
125:
116:
106:
99:
92:
85:
73:
61:Please help
56:verification
53:
29:
390:Flank speed
376:Full astern
373:Half astern
370:Slow astern
334:Full astern
331:Half astern
328:Slow astern
201:flank speed
175:engine room
467:Categories
401:References
358:Slow ahead
355:Half ahead
352:Full ahead
310:Slow ahead
307:Half ahead
304:Full ahead
242:submarines
89:newspapers
34:Chadbourne
451:6 January
288:USS
194:Operation
167:submarine
119:July 2011
395:Teleseme
384:See also
229:throttle
209:cavitate
159:Chadburn
18:Chadburn
316:Standby
290:LST-325
103:scholar
425:2 July
171:bridge
155:E.O.T.
105:
98:
91:
84:
76:
272:alarm
110:JSTOR
96:books
453:2013
427:2011
364:Stop
319:Stop
240:and
165:(or
163:ship
82:news
343:RPM
153:or
149:An
65:by
469::
444:.
455:.
429:.
132:)
126:(
121:)
117:(
107:·
100:·
93:·
86:·
59:.
36:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
