Terra Nova and Scott of the Antarctic · 2021. 1. 31. · The three-masted barque, built in Dundee,...
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Deadline for this submission: Terra Nova and Scott of the Antarctic Feb. 1, 2021 Due date Name Terra Nova and Scott of the Antarctic January 2, 2021 DAVE BERSON The barque Terra Nova was specially reinforced for working in polar sea ice. Best remembered as the ship that carried Robert Scott on his ill-fated voyage to the Antarctic in 1910, Terra Nova (new land) survived the harshest sea conditions for almost six decades before meeting her end. The three-masted barque, built in Dundee, Scotland, in 1884 by Alexander Stephens and Sons, was 664 tons and 187 feet long. Beginning life as a steam-auxiliary sailing ship, Terra Nova worked first as a whaler in the Arctic and then in the more profitable business of hunting seal pups for their furs. It is estimated that in her career as a sealer, Terra Nova carried more than 800,000 seal pelts — a bloody business. The ship first went to the Antarctic in 1903 to rescue Scott’s ship Discovery from the pack ice in McMurdo Sound. In preparation for his return to the Antarctic, Scott purchased Terra Nova for £12,500. The ship was reinforced with seven feet of oak to protect the bows and steel plating to reinforce the stem. Scott described the ship as “a wonderfully fine ice ship … as she bumped the floes with mighty shocks, crushing a way through some, twisting and turning to avoid others, she seemed like a living thing fighting a great fight.” Scott used Terra Nova at Ross Island as part of his base camp. The ship itself had a crew of 65 and Scott’s team consisted of 24 officers and scientific staff. The purpose of Scott’s effort, called the British Antarctic Expedition, was for the British to arrive at the south pole first. Unfortunately, the Norwegian explorer Roald Amundsen arrived at the pole a month before Scott and his five-member team. On the way back to base camp, Scott and his men perished, Scott and two of his companions dying only 11 miles from the nearest food depot. Terra Nova went back to the Arctic carrying cargo in World War I for the Canadian government and then hauling cargo for the Americans in Greenland during World War II. In 1942, off of Greenland, the ship struck ice and sank. The USCG mounted a rescue operation and all 24 crew members were saved. The wreck was accidentally rediscovered in 2012. Before sinking, the ship’s bell was saved and is kept at the Scott Polar Research Institute. The bell is struck at 16:00 hours daily, announcing a coffee break and afternoon tea — five bells in the AM and eight bells in the afternoon. Let’s join Captain Henry Pennell on the way from Cardiff, Wales, in 1910 to South Africa to pick up Captain Scott. We’ll use the 2020 Nautical Almanac. It is July 3 and we are at a DR of 5° 18’ south by 15° 12’ west. Height of eye is 20 feet. At 04:30:12 GMT, the navigator has clear sky to take a shot of Saturn. The Hs is 55° 10.8’. A. What is the HO of Saturn? B. What is the LHA? C. What is the intercept? D. What is the estimated position? Celestial Navigation Challenge Nav Problem Narrative Sarasota Power Squadron 1
Transcript of Terra Nova and Scott of the Antarctic · 2021. 1. 31. · The three-masted barque, built in Dundee,...
Deadline for this submission: Terra Nova and Scott of the Antarctic
Feb. 1, 2021
Due dateName
Terra Nova and Scott of the AntarcticJanuary 2, 2021DAVE BERSON
The barque Terra Nova was specially reinforced for working in polarsea ice.
Best remembered as the ship that carried Robert Scott on his ill-fated voyage to the Antarctic in 1910, Terra Nova (new land) survived the harshest sea conditions for almost six decades before meeting her end. The three-masted barque, built in Dundee, Scotland, in 1884 by Alexander Stephens and Sons, was 664 tons and 187 feet long. Beginning life as a steam-auxiliary sailing ship, Terra Nova worked first as a whaler in the Arctic and then in the more profitable business of hunting seal pups for their furs. It is estimated that in her career as a sealer, Terra Nova carried more than 800,000 seal pelts — a bloody business.The ship first went to the Antarctic in 1903 to rescue Scott’s ship Discovery from the pack ice in McMurdo Sound. In preparation for his return to the Antarctic, Scott purchased Terra Nova for £12,500. The ship was reinforced with seven feet of oak to protect the bows and steel plating to reinforce the stem. Scott described the ship as “a wonderfully fine ice ship … as she bumped the floes with mighty shocks, crushing a way through some, twisting and turning to avoid others, she seemed like a living thing fighting a great fight.” Scott used Terra Nova at Ross Island as part of his base camp. The ship itself had a crew of 65 and Scott’s team consisted of 24 officers and scientific staff.The purpose of Scott’s effort, called the British Antarctic Expedition, was for the British to arrive at the south pole first.Unfortunately, the Norwegian explorer Roald Amundsen arrived at the pole a month before Scott and his five-member team. On the way back to base camp, Scott and his men perished, Scott and two of his companions dying only 11 miles from the nearest food depot.Terra Nova went back to the Arctic carrying cargo in World War I for the Canadian government and then hauling cargo for the Americans in Greenland during World War II. In 1942, off of Greenland, the ship struck ice and sank. The USCG mounted a rescue operation and all 24 crew members were saved. The wreck was accidentally rediscovered in 2012. Before sinking, the ship’s bell was saved and is kept at the Scott Polar Research Institute. The bell is struck at 16:00 hours daily, announcing a coffee break and afternoon tea — five bells in the AM and eight bells in the afternoon.Let’s join Captain Henry Pennell on the way from Cardiff, Wales, in 1910 to South Africa to pick up Captain Scott. We’ll use the 2020 Nautical Almanac.It is July 3 and we are at a DR of 5° 18’ south by 15° 12’ west. Height of eye is 20 feet. At 04:30:12 GMT, the navigator has clear sky to take a shot of Saturn. The Hs is 55° 10.8’.A. What is the HO of Saturn? B. What is the LHA? C. What is the intercept? D. What is the estimated position?
Celestial Navigation Challenge Nav Problem Narrative Sarasota Power Squadron
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Nav Problem: Terra Nova and Scott of the Antarctic
INFO PROVIDED from narrative:
Date: Jul 3, 2020WT:
WE (f-) (s+):
ZTZD
Time (UT)
4:30:12
Body: SaturnSight: PlanetHt of Eye:
20 ft.
IC: 0.0'Method: LOC
Sextant Hs: 55º 10.8'DR: L 5º 18.0' S
Lo 15º 12.0' WNautical
Almanac:NA2020
QUESTIONS: ANSWERS:
A. What is the Ho of Saturn? Ho : 55º 5.8' SEE LOC WORKSHEETB. What is the LHA? (use LOC worksheet) LHA : 31º 51.9' SEE LOC WORKSHEETC. What is the intercept? Intercept : 29.2 nm A SEE LOC WORKSHEETD. What is the EP (Estimated Position)? EP: L: 5º 4.0' S SEE PLOTTING WRK
Lo: 14º 46.0' W
Origin
Destination
Celestial Navigation Challenge Solutions Summary Sarasota Power Squadron
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USPS SIGHT REDUCTION - Form 96aTIME PROBLEM: Terra Nova and Scott of the Antarctic ALTITUDE
Date Jul 3, 2020 Ht/Eye 20 ft.WT S/M/P Star hemi Hs 55º 10.8'WE SIGHT DATA: Body Saturn 1 (+) (-)ZT 3:30:12 DR L 5º 18.0' S IC 0.0'
ZD 1:00:00 DR Lo 15º 12.0' W Dip XXXX 4.3'UT 4:30:12 Total 0.0' 4.3'
UT corr. 4:30:12 Corr -4.3'G Day/Mo Jul 3, 2020 55º 6.5'
Ha 55º 6.5'
ALMANAC - LHA
SHA HP (moon) ___________
Saturn (+) (-)
GHA4 39º 29.6' Main 0.7'
30/12 7º 33.0' Add’l M/PlUL -30.00’
v factor 2.6 v corr. 1.3' Add'l RefractTot GHA 47º 3.9' DECLINATION: Totals 0.0' 0.7'
DR Lo -15º 12.0' W DEC: 20º 21.9' S Ttl. Corr -0.7'
LHA 31º 51.9' d(+/-) 0 d corr 0.0' (+/- based on trend of Dec) Ho 55º 5.8'
DEC 20º 21.9' S
INTERCEPT AND AZIMUTH by the LAW of COSINES METHODNote: Enter Lat as positive. LHA 31º 51.9' 31.86500If Lat/Dec contrary name enter Dec as negative. LAT 5º 18.0' S 5.30000Convert LHA, Lat, and Dec to 5 place rounded decimal degrees. DEC 20º 21.9' S 20.36500
Sin -1 ((cos LHA x cos LAT x cos DEC) + (sin LAT x sin DEC)) = Hc Hc = 55.583 ºCos-1 ((sin DEC - (sin LAT x sin Hc)) / (cos LAT x cos Hc)) = Z = 61.1º Zn = 241 º
Hc 55º 35.0' Z = 61.1ºHo 55º 5.8'
INTERCEPT a = 29.2 nm
AZIMUTH Zn = 241 A Zn Calc:
Note: Ho >Hc = Toward LAT LHA<180 LHA>180
Hc > Ho = Away LHA 32º N 360-Z ZLAT S S 180+Z 180-Z
N 299º 61ºS 241º 119º
SMP=1Star=2
Hr (UT)M/Sec
( F-) (S+)
( E-) (W+)
E +W -
(T/A)
2012
M
m
0000
0600
1200
1800
G
g
G
NS
EW
Celestial Navigation Challenge Law of Cosines wrksheet Sarasota Power Squadron
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R
R
Form CLS 98
Squadron
Name
1998 USPS
Sight No.
Constant Latitude Scale Small Area Plotting Sheet
UNITED STATES POWER SQUADRONS
c
50
250
240
LatMid
LatMid
LA
TIT
UD
EM
IDD
LE
LA
TIT
UD
EM
IDD
LE
350
340
330
320
310
300
290
280
270
260
230
220
210
200190 180 170
160
150
140
130
120
110
100
9080
70
60
50
40
30
20
100
50
40
30
20
10
0
40
30
20
10
0
55’
50’
45’
40’
35’
55’015º 50’ 45’ 40’ 35’ 30’
0330
05’
10’
15’
20’
25’
30’
30’ 25’ 20’ 15’ 10’ 05’
0330
Saturn
14º30’15º 30’
04º 30’
5º 0’
05º 30’
30
Using the USPS Small Area Plotting SheetLatitude SouthLongitude West
EP (LOC): L 5º 4.0' S
Lo 14º 46.0' W
S
S
W W
Note: Red dotted lines used for L/Lo measurement
only.
From LOC wrk:
DR-L 5º 18.0' S
DR-Lo 15º 12.0' W
a 29.2 Zn 241º A
EP L 5º 4.0' S
Lo 14º 46.0' W
Shakedown to Bermuda Plotting Sheet CLS 98 Sarasota Power Squadron
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