46:
107:
436:
The Mark 8 was similar to the Mark 6 Mod 1 but was constructed entirely out of nickel steel. The Mod 1 had a slightly smaller diameter chamber, but the same volume. The Mod 2 had its rifling grooves increased to 36 from 24 and didn't have the modified chamber of the Mod 1. The Mod 3 had a cylindrical
432:
was used for the tube, two hoops and the locking ring, the gun was also hooped to the muzzle, because of this, the original muzzle velocity was able to be restored. The Mod 2 were Mod 0s with a hoop added to the chase along with a cylindrical liner made from nickel-steel. With these changes the
428:. It was discovered that the pressure curve of the charge and the strength curve of the barrel match exactly along one point of the barrel, because of this the muzzle velocity was reduced from the original 2,800 ft/s (850 m/s) to 2,600 ft/s (790 m/s). With the Mod 1
437:
liner made of nickel-steel along with a new chamber design and 36 grooves. Mod 4 used an earlier gun that had its liner replaced with a conical nickel-steel liner along with 36 grooves and the chamber of the Mod 3.
832:
s had their guns reduced to eight in 1909, the guns would go on to arm auxiliary ships during World War I and again in World War II. After WW I, and as a result of the signing of the
881:
1486:
887:
Two guns each in Alaska at Cold Bay, Chernofski, Umnak, George Island (one gun), Yakutat, Nome, Annette Island, Adak Island, Shemya Island, and Popof Island
1197:
1065:
1509:
849:
1127:
1103:
938:
Four guns, Paramaribo, Suriname (formerly Dutch Guiana). One is a Mark 6 Mod 1, No. 309L, another is a Mark 6 Mod 2, No. 314L
852:. This list may not be exhaustive. They were grouped into two-gun batteries unless otherwise noted. Most of the batteries in
17:
72:
941:
One gun presumably from USS Georgia (BB-15) alongside the ship's bell, Georgia
Institute of Technology, Atlanta, GA.
1190:
871:
384:
848:
6"/50 caliber ex-Navy guns were emplaced during World War II at numerous locations; most were operated by the
1303:
1244:
1239:
1066:"Naval 6 Inch 50 Caliber Gun - ROTC, Georgia Tech, Atlanta, GA - Static Artillery Displays on Waymarking.com"
444:, 300.2 in (7,630 mm), is used to measure the caliber of the gun. (i.e.:300.2/6=50) Normally the
448:, 294 in (7,500 mm), would be used and this would actually be a 49 caliber gun. (i.e.:294/6=49)
793:
1519:
1183:
445:
367:
1514:
970:
674:
357:
742:
657:
589:
406:
249:
1465:
976:
833:
776:
374:
1175:
1259:
1254:
1249:
1234:
1229:
1224:
759:
691:
572:
350:
285:
877:
Six guns in a two-gun and a four-gun battery, temporary defenses of Grays Harbor, Westport, WA
1449:
1444:
1431:
1421:
1416:
1411:
1392:
1387:
1382:
1359:
1354:
1349:
1339:
1334:
1329:
1324:
1319:
1298:
1293:
1283:
1278:
640:
268:
951:
1439:
810:
725:
708:
623:
606:
538:
521:
487:
166:
8:
555:
402:
932:
Two Mark 8 Mod 2 guns, Midvale Nos. 550 and 554, Blunts Point, Pago Pago, American Samoa
425:
410:
346:
262:
146:
112:
1123:
1099:
837:
470:
390:
1137:
957:
504:
50:
1117:
1113:
380:
315:
45:
898:
345:(spoken "six-inch-fifty-caliber") were used for the secondary batteries of the
1503:
891:
856:
were disestablished in 1943 as new defenses were built or the threat abated.
171:
1215:
897:
Four guns in two batteries at Blunt's Point and
Breakers Point, Pago Pago,
429:
417:
305:
129:
1159:
890:
Two guns each in
Batteries 954 and 604, Shalloway Point and Latine Point,
1207:
1164:
440:
This gun is also unusual for the US Navy where the overall length of the
363:
124:
1053:
861:
836:, many of these ships were scrapped; the guns were later put to use as
441:
295:
242:
1402:
1369:
67:
1170:
1037:
1035:
904:
421:
1160:
Bluejackets Manual, 1917, 4th revision: US Navy 14-inch Mark 1 gun
964:
1373:
1269:
1205:
1032:
275:
935:
Two Mark 8 Mod 2 guns, Breakers Point, Pago Pago, American Samoa
1481:
853:
1138:"United States of America 6"/50 (15.2 cm) Mark 6 and Mark 8"
330:
15,000 yd (14,000 m) at 14.9° elevation WWI charge
333:
16,000 yd (15,000 m) at 15° elevation WWII charge
1022:
1020:
1018:
1016:
409:. The gun card designates the gun as 46-caliber but the
920:
One Mark 8 gun, Naval Gun
Factory 368, Nome airport, AK
1013:
1003:
1001:
999:
997:
995:
993:
416:
The Mark 6 gun was constructed of gun steel using a
990:
960:- Army coast defense weapon of similar type and era
405:Mark 6 guns were developed around the time of the
383:. They were also used as the main battery on the
196:Mark 6: 136 (Nos. 197, 210–259, 277–359, 421–422)
1501:
1098:(Third ed.). McLean, Virginia: CDSG Press.
965:Weapons of comparable role, performance and era
224:18,112 lb (8,215 kg) (without breech)
1167:at the Coast Defense Study Group, Inc. website
1191:
1171:FortWiki, lists most CONUS and Canadian forts
1096:American Seacoast Defenses, A Reference Guide
916:Surviving 6"/50 caliber naval guns include:
227:18,628 lb (8,450 kg) (with breech)
199:Mark 8: 215 (Nos. 360–420, 427–510, 525–594)
1198:
1184:
1165:List of all US coastal forts and batteries
843:
1136:
1112:
1026:
1007:
850:United States Army Coast Artillery Corps
929:One gun, George Island, Cross Sound, AK
14:
1502:
1093:
1041:
1179:
911:
248:294 in (7,500 mm) bore (49
1122:. Seaforth Publishing. p. 180.
954:- includes 6"/40 caliber Mark 3 guns
923:Two guns, Cannon Beach, Yakutat, AK
433:original muzzle velocity was used.
343:6"/50 caliber gun Mark 6 and Mark 8
24:
25:
1531:
1153:
1330:5"/51 caliber Mark 7–8 and 14–15
926:One gun, city dump, Cold Bay, AK
451:
325:Effective firing range
105:
44:
38:6"/50 caliber Mark 6 and Mark 8
1510:Naval guns of the United States
1087:
267:105 lb (48 kg) naval
1206:American naval weapons of the
1119:Naval Weapons of World War One
1058:
1047:
413:lists the guns as 50-caliber.
320:2,800 ft/s (850 m/s)
188:
13:
1:
1094:Berhow, Mark A., ed. (2015).
1054:Battery Lobos at FortWiki.com
237:300.2 in (7,630 mm)
1044:, pp. 216–226, 236–237.
822:Mark 10: 14 × single mounts
805:Mark 10: 14 × single mounts
788:Mark 10: 14 × single mounts
771:Mark 10: 14 × single mounts
754:Mark 10: 14 × single mounts
737:Mark 10: 14 × single mounts
720:Mark 10: 14 × single mounts
703:Mark 10: 14 × single mounts
686:Mark 10: 14 × single mounts
669:Mark 10: 14 × single mounts
652:Mark 10: 14 × single mounts
635:Mark 10: 14 × single mounts
618:Mark 10: 14 × single mounts
601:Mark 10: 12 × single mounts
584:Mark 10: 12 × single mounts
567:Mark 10: 12 × single mounts
550:Mark 10: 12 × single mounts
533:Mark 10: 12 × single mounts
516:Mark 10: 16 × single mounts
499:Mark 10: 16 × single mounts
482:Mark 10: 16 × single mounts
401:The 6-inch (152 mm)/50
7:
1250:13"/35 caliber Mark 1 and 2
1235:12"/40 caliber Mark 3 and 4
1230:12"/35 caliber Mark 1 and 2
945:
880:Two guns in Battery Allen,
870:Two guns in Battery Lobos,
10:
1536:
1355:8"/35 caliber Mark 3 and 4
1345:6"/50 caliber Mark 6 and 8
1335:6"/30 caliber Mark 2 and 3
1325:5"/50 caliber Mark 5 and 6
1289:6"/50 caliber Mark 6 and 8
1279:6"/30 caliber Mark 2 and 3
867:Two guns near Freeport, TX
29:Naval gun *Coastal defence
1474:
1458:
1430:
1401:
1368:
1312:
1268:
1214:
971:BL 6 inch Mk XI naval gun
903:Four guns at Paramaribo,
396:
324:
314:
304:
294:
284:
274:
261:
256:
241:
233:
218:
213:
205:
187:
179:
160:
152:
142:
137:
118:
100:
92:
87:
80:Place of origin
79:
62:
57:, 6-inch/50 caliber guns.
43:
36:
983:
894:, Argentia, Newfoundland
1466:.50 caliber machine gun
977:15 cm/50 41st Year Type
907:(formerly Dutch Guiana)
844:Coast defense locations
834:Washington Naval Treaty
280:6 in (152 mm)
1475:Anti-submarine weapons
1388:4"/40 caliber Mark 1–6
1320:5"/40 caliber Mark 2–4
1140:. Navweaps. 2 May 2015
819:Mark 8: 6"/50 caliber
802:Mark 8: 6"/50 caliber
785:Mark 8: 6"/50 caliber
768:Mark 8: 6"/50 caliber
751:Mark 6: 6"/50 caliber
734:Mark 6: 6"/50 caliber
717:Mark 6: 6"/50 caliber
700:Mark 6: 6"/50 caliber
683:Mark 6: 6"/50 caliber
666:Mark 6: 6"/50 caliber
649:Mark 6: 6"/50 caliber
632:Mark 8: 6"/50 caliber
615:Mark 6: 6"/50 caliber
598:Mark 6: 6"/50 caliber
581:Mark 6: 6"/50 caliber
564:Mark 6: 6"/50 caliber
547:Mark 6: 6"/50 caliber
530:Mark 6: 6"/50 caliber
513:Mark 6: 6"/50 caliber
496:Mark 6: 6"/50 caliber
479:Mark 6: 6"/50 caliber
424:, a locking ring, and
306:Rate of fire
167:U.S. Naval Gun Factory
18:6"/50 caliber gun
1432:Anti-aircraft weapons
1304:10"/40 caliber Mark 3
1245:12"/50 caliber Mark 7
1240:12"/45 caliber Mark 5
1225:10"/30 caliber Mark 2
1487:8"/23 caliber Mark 7
1360:8"/45 caliber Mark 6
1350:7"/45 caliber Mark 2
1340:6"/40 caliber Mark 4
1299:8"/45 caliber Mark 6
1294:8"/30 caliber Mark 2
1284:6"/40 caliber Mark 4
407:Spanish–American War
316:Muzzle velocity
979:Japanese equivalent
874:, San Francisco, CA
310:6 rounds per minute
1313:Secondary armament
1070:www.waymarking.com
973:British equivalent
912:Surviving examples
426:Welin breech block
411:Bureau of Ordnance
391:protected cruisers
347:United States Navy
147:Bureau of Ordnance
138:Production history
113:United States Navy
1520:Coastal artillery
1495:
1494:
1129:978-1-84832-100-7
1105:978-0-9748167-3-9
952:6"/30 caliber gun
838:coastal artillery
826:
825:
366:, as well as the
339:
338:
209:Mark 6 and Mark 8
16:(Redirected from
1527:
1515:152 mm artillery
1200:
1193:
1186:
1177:
1176:
1149:
1147:
1145:
1133:
1114:Friedman, Norman
1109:
1081:
1080:
1078:
1076:
1062:
1056:
1051:
1045:
1039:
1030:
1024:
1011:
1005:
958:6-inch gun M1897
456:
455:
381:armored cruisers
190:
111:
109:
108:
48:
39:
34:
33:
21:
1535:
1534:
1530:
1529:
1528:
1526:
1525:
1524:
1500:
1499:
1496:
1491:
1470:
1454:
1426:
1397:
1364:
1308:
1264:
1210:
1208:First World War
1204:
1156:
1143:
1141:
1130:
1106:
1090:
1085:
1084:
1074:
1072:
1064:
1063:
1059:
1052:
1048:
1040:
1033:
1025:
1014:
1006:
991:
986:
967:
948:
914:
846:
454:
420:, jacket, four
399:
257:
106:
104:
93:In service
88:Service history
73:Coastal defence
58:
37:
32:
23:
22:
15:
12:
11:
5:
1533:
1523:
1522:
1517:
1512:
1493:
1492:
1490:
1489:
1484:
1478:
1476:
1472:
1471:
1469:
1468:
1462:
1460:
1456:
1455:
1453:
1452:
1447:
1442:
1436:
1434:
1428:
1427:
1425:
1424:
1419:
1414:
1408:
1406:
1399:
1398:
1396:
1395:
1390:
1385:
1379:
1377:
1366:
1365:
1363:
1362:
1357:
1352:
1347:
1342:
1337:
1332:
1327:
1322:
1316:
1314:
1310:
1309:
1307:
1306:
1301:
1296:
1291:
1286:
1281:
1275:
1273:
1266:
1265:
1263:
1262:
1260:14"/50 caliber
1257:
1255:14"/45 caliber
1252:
1247:
1242:
1237:
1232:
1227:
1221:
1219:
1212:
1211:
1203:
1202:
1195:
1188:
1180:
1174:
1173:
1168:
1162:
1155:
1154:External links
1152:
1151:
1150:
1134:
1128:
1110:
1104:
1089:
1086:
1083:
1082:
1057:
1046:
1031:
1029:, p. 180.
1012:
988:
987:
985:
982:
981:
980:
974:
966:
963:
962:
961:
955:
947:
944:
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942:
939:
936:
933:
930:
927:
924:
921:
913:
910:
909:
908:
901:
899:American Samoa
895:
888:
885:
878:
875:
868:
865:
864:, Beaufort, NC
860:Two guns near
845:
842:
824:
823:
820:
817:
815: (ACR-13)
807:
806:
803:
800:
798: (ACR-12)
796:North Carolina
790:
789:
786:
783:
781: (ACR-11)
773:
772:
769:
766:
764: (ACR-10)
756:
755:
752:
749:
739:
738:
735:
732:
722:
721:
718:
715:
705:
704:
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671:
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667:
664:
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579:
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551:
548:
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528:
518:
517:
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511:
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500:
497:
494:
484:
483:
480:
477:
467:
466:
463:
462:Gun Installed
460:
453:
450:
398:
395:
337:
336:
335:
334:
331:
326:
322:
321:
318:
312:
311:
308:
302:
301:
300:−100° to +100°
298:
292:
291:
288:
282:
281:
278:
272:
271:
269:armor-piercing
265:
259:
258:
254:
253:
246:
239:
238:
235:
231:
230:
229:
228:
225:
220:
216:
215:
214:Specifications
211:
210:
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197:
192:
185:
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176:
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174:
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135:
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133:
132:
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116:
115:
102:
98:
97:
94:
90:
89:
85:
84:
81:
77:
76:
75:
70:
64:
60:
59:
49:
41:
40:
31:
30:
26:
9:
6:
4:
3:
2:
1532:
1521:
1518:
1516:
1513:
1511:
1508:
1507:
1505:
1498:
1488:
1485:
1483:
1480:
1479:
1477:
1473:
1467:
1464:
1463:
1461:
1459:Light weapons
1457:
1451:
1450:3"/50 caliber
1448:
1446:
1445:3"/23 caliber
1443:
1441:
1438:
1437:
1435:
1433:
1429:
1423:
1422:4"/50 caliber
1420:
1418:
1417:3"/50 caliber
1415:
1413:
1412:3"/23 caliber
1410:
1409:
1407:
1404:
1400:
1394:
1393:4"/50 caliber
1391:
1389:
1386:
1384:
1383:3"/50 caliber
1381:
1380:
1378:
1375:
1371:
1367:
1361:
1358:
1356:
1353:
1351:
1348:
1346:
1343:
1341:
1338:
1336:
1333:
1331:
1328:
1326:
1323:
1321:
1318:
1317:
1315:
1311:
1305:
1302:
1300:
1297:
1295:
1292:
1290:
1287:
1285:
1282:
1280:
1277:
1276:
1274:
1272:main armament
1271:
1267:
1261:
1258:
1256:
1253:
1251:
1248:
1246:
1243:
1241:
1238:
1236:
1233:
1231:
1228:
1226:
1223:
1222:
1220:
1218:main armament
1217:
1213:
1209:
1201:
1196:
1194:
1189:
1187:
1182:
1181:
1178:
1172:
1169:
1166:
1163:
1161:
1158:
1157:
1139:
1135:
1131:
1125:
1121:
1120:
1115:
1111:
1107:
1101:
1097:
1092:
1091:
1071:
1067:
1061:
1055:
1050:
1043:
1038:
1036:
1028:
1027:Friedman 2011
1023:
1021:
1019:
1017:
1009:
1008:Navweaps 2015
1004:
1002:
1000:
998:
996:
994:
989:
978:
975:
972:
969:
968:
959:
956:
953:
950:
949:
940:
937:
934:
931:
928:
925:
922:
919:
918:
917:
906:
902:
900:
896:
893:
892:Fort McAndrew
889:
886:
883:
879:
876:
873:
869:
866:
863:
859:
858:
857:
855:
851:
841:
839:
835:
831:
821:
818:
816:
814:
809:
808:
804:
801:
799:
797:
792:
791:
787:
784:
782:
780:
775:
774:
770:
767:
765:
763:
758:
757:
753:
750:
748:
747: (ACR-9)
746:
741:
740:
736:
733:
731:
730: (ACR-8)
729:
724:
723:
719:
716:
714:
713: (ACR-7)
712:
707:
706:
702:
699:
697:
696: (ACR-6)
695:
690:
689:
685:
682:
680:
679: (ACR-5)
678:
677:West Virginia
673:
672:
668:
665:
663:
662: (ACR-4)
661:
656:
655:
651:
648:
646:
644:
639:
638:
634:
631:
629:
627:
622:
621:
617:
614:
612:
610:
605:
604:
600:
597:
595:
594: (BB-17)
593:
588:
587:
583:
580:
578:
577: (BB-16)
576:
571:
570:
566:
563:
561:
560: (BB-15)
559:
554:
553:
549:
546:
544:
543: (BB-14)
542:
537:
536:
532:
529:
527:
526: (BB-13)
525:
520:
519:
515:
512:
510:
509: (BB-12)
508:
503:
502:
498:
495:
493:
492: (BB-11)
491:
486:
485:
481:
478:
476:
475: (BB-10)
474:
469:
468:
464:
461:
458:
457:
452:Naval Service
449:
447:
443:
438:
434:
431:
427:
423:
419:
414:
412:
408:
404:
394:
392:
389:
387:
382:
379:
377:
372:
370:
365:
362:
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332:
329:
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270:
266:
264:
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240:
236:
232:
226:
223:
222:
221:
217:
212:
208:
204:
198:
195:
194:
193:
186:
182:
178:
173:
172:Midvale Steel
170:
168:
165:
164:
163:
159:
155:
151:
148:
145:
141:
136:
131:
128:
126:
123:
122:
121:
117:
114:
103:
99:
95:
91:
86:
83:United States
82:
78:
74:
71:
69:
66:
65:
61:
56:
55: (BB-12)
54:
47:
42:
35:
28:
27:
19:
1497:
1440:QF 1-pounder
1344:
1288:
1216:Capital ship
1144:22 September
1142:. Retrieved
1118:
1095:
1088:Bibliography
1073:. Retrieved
1069:
1060:
1049:
915:
882:Fort Babcock
847:
829:
827:
812:
795:
778:
761:
745:South Dakota
744:
727:
710:
693:
676:
660:Pennsylvania
659:
645: (C-22)
642:
628: (C-21)
625:
611: (C-20)
608:
592:Rhode Island
591:
574:
557:
540:
523:
506:
489:
472:
439:
435:
430:nickel-steel
415:
400:
385:
375:
369:Pennsylvania
368:
358:
351:
342:
340:
290:−10° to +15°
245: length
161:Manufacturer
130:World War II
101:Used by
52:
1042:Berhow 2015
884:, Sitka, AK
446:bore length
364:battleships
191: built
125:World War I
1504:Categories
872:Fort Miley
862:Fort Macon
779:Washington
694:California
643:Charleston
575:New Jersey
465:Gun Mount
442:gun barrel
1403:Submarine
1370:Destroyer
1075:27 August
811:USS
794:USS
777:USS
762:Tennessee
760:USS
743:USS
726:USS
709:USS
692:USS
675:USS
658:USS
641:USS
626:Milwaukee
624:USS
609:St. Louis
607:USS
590:USS
573:USS
556:USS
539:USS
522:USS
505:USS
488:USS
471:USS
386:St. Louis
376:Tennessee
286:Elevation
183:1900–1917
68:Naval gun
51:USS
1376:armament
1116:(2011).
946:See also
905:Suriname
728:Maryland
711:Colorado
541:Nebraska
524:Virginia
490:Missouri
359:Virginia
296:Traverse
250:calibers
206:Variants
180:Produced
153:Designed
143:Designer
1374:gunboat
1270:Cruiser
813:Montana
558:Georgia
403:caliber
276:Caliber
1126:
1102:
397:Design
388:-class
378:-class
371:-class
361:-class
354:-class
243:Barrel
234:Length
110:
1482:Y-gun
984:Notes
854:CONUS
830:Maine
473:Maine
459:Ship
422:hoops
352:Maine
263:Shell
1405:guns
1372:and
1146:2016
1124:ISBN
1100:ISBN
1077:2024
828:The
507:Ohio
418:tube
373:and
356:and
341:The
219:Mass
156:1898
119:Wars
96:1903
63:Type
53:Ohio
349:'s
189:No.
1506::
1068:.
1034:^
1015:^
992:^
840:.
393:.
1199:e
1192:t
1185:v
1148:.
1132:.
1108:.
1079:.
1010:.
252:)
20:)
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