YMS-463
YMS-413
lask Unlt and Functlon The mfnesweeper YNS-413 was a member of TU 1.8.5 the survey unit. its (Survey Unit). As part of misslon included surveying the probable effects of the nuc.lear tests on fish and other wlldlife and conducting an oceanographic survey to determine the character of the ocean currents in and around Bikini Atoll.
31 July 0615 1730
2-7 August
1 July
3 July 0540 1210
2146 4 July 0715 1535 .7-9July
11-13 July
16 July 0532 1445
Engaged in routine fishing operations: at conclusion returned to Bikini.
Moored at Rongelap Atoll. Underway for fishing operations. Anchored at Rongelap. Underway for Bikini. Commenced fishing operations. Moored at Blklnl.
15-17 August Engaged In routine fishing operations: at conclusion returned to Bikini. 28-29 August Engaged in streaming wire dragging gear: at conclusion returned to Bikini. 31 August-6 September Engaged in streamfng wlre dragging gear: at conclusion anchored in Bikini Lagoon.
Engaged in flshing operations at Rikini. returning to the lagoon at the conclusion 9-11 September O C fishing activltles each day. Engaged in wlre dragging operations; at conclusion anchoredin Bikini. Engaged in fishing operations. anchoring 14 September at Riklni at the conclusion of each day's activltles. Underway from Bikini to Kwajalein. 1205 Underway for routine fishing operations. Moored in Bikini.
15 September 1547 Moored In berth K-15, Kwajalein. 21 October
17 July 1710
Engaged in routine fishing operations: at conclusion returned to Bikini. Engaged in routine fishing operations: at conclusion returned to Bikini.
S h o t ABLE ( 1 July, 0 9 0 0 ) 0900
Fell out of formatfon €or fishing operat ions. Moored at Bikini.
Underway from Kwajalelnto Guam.
Proceeding to Rongerlk Atoll. YHS-463
18 July 0.135
1245 19 Jbly 0550 0732
Commenced routine fishing operations near Crew Size: 1 7 Blklnl Atoll Arrlval: 22 March 1946 Rongeri k. Moored at Rongerik. Blklnl Atoll Departure: 14 September 1946 Shot ABLE Locatlon: A t Rongelap, 65 nml (120 km) E Shot BAKER Locatlon: At Rongelap, 65 nml (120 km) E Oecontamlnatlon Locatlon: Guam/Marlanas Underway for Rongelap. Operational Clearance: 20 December 1946 Rongelap trip postponed. anchored at RonFinal Clearance: 10 February 1947 gerlk.
Task Unlt and Functlon
LO July 0610 1025
Underway for Rongelap. Anchored at Rongelap.
21 July 0510 1535
Underway for Rongerik. Moored at Rongerik.
22 July 0555 1118
Underway to Rongelap. Moored In Rongelap Atoll.
24 July
Engaged in routine fishing operations: moored at Rongelapat day's end.
The minesweeper YMS-463 wds a member of 'TU 1.8.5 (Survey Unit). As part of the survey unit, its missfon included surveying the probable effects of the nuclear tests on fish and other wildlife and conducting an oceanographic survey to determfne the character of the ocean currents in and around Bikini Atoll. Shot ABLE ( 1 July, 0900) 1 JulyAnchoredatRongelapAtoll. 4 July
2210UnderwaytoBikiniAtoll. Shot BAKER (25 July, 0835) 25 July 0835MooredatRongelapAtoll.
5 July 0645AnchoredatBikiniIsland.
in routine fishing operations: 26-29JulyEngaged at the end of each moored at Rongelap day.
9 July Took continuous lead line readlngs throughoutnightforbiologicalsurvey off anchorage. 0855AnchoredoffNamIsland,carryingout extensive biological surveys.
30 July 1624UnderwaytoBikini.
12 July Shifted berths.
