Jeg har foretrukket den først beskrevne Methode 
kunne holde Deviation og Misvisning ud fra hinanden. 
— 8 
for at 
described above, 
the variation. 
in order to-keep apart the deviation and 
Beregningerne udførtes efter nedenstaaende Skema og 
The computations were made as shown below. 
Exempel. 
1877. Juni 16. Klokkeslet. | 5am. 6 am. 7 am. | 8 am. 9 am. | MD. 3 pm. Hour. 1877. June 16. 
Observeret Kurs IN 35°F |S 45° W |S 45° W |S 58° W |S 289 W |S 789 WIS 45°H | Ship's Head by C: 
Misvisende Kurs N 22°F |S 66° W |S 66° W |S 80° W |S 45° W |N 81° W|S 50°E | Do. true Magnetic Course. 
Log. Meter pr. Sec. Fi og ba Ani GH |. © 2.2 o. | 4.4 |Log. Metres per Second. 
Observ. Vind-Retn. p. C. S 85" WS 259 WS 300 W 8 269 W S28"W |S 33° WS 33° W | Observed Direction of Wind 
| | by ©: 
Deyiation [= ng? |e a ete Bi | So pg VEGG etan V= | Deviation. 
Misv. Vindretning ombord S 729 W| S46W S51°W| S 48°W) S 44°W| S 54°W)| S 210W.Obs. true Magnetic Dir. of 
| | | | Wind. 
Obs. Vindhastig.Meter pr. Sec. 4.9 5.6 7.9 8.4 11.4 12.0 9.8 |Observed Velocity of Wind. 
Construeret misv. Vindretn. | S 50° W|/S 46° W | S 50° W| S 48° W| S 44° W| S 54° W| S 47° W Constructed Magn. Direction 
| | | | | of Wind. 
Misvisning |= ie? | — 199 }—199 |—190 |—199 |—790 |—790 | Variation of Compass. 
Retvisende Vindretn.iGrader | S 31° W S 27°W| S312W| S 290W S250W| S350W  S28"W True Direction of Wind. 
* Streger | SW,S| SSW | SW,S] SW;S| SSW | SW;S| SW,S Do. in Points. 
Sand Vindhastighed. Meter | JG || 86 7.6 8.4 Q.2 12.0 10.0 | True Velocity of Wind. Me- 
pr. See. | tres per Second. 
hvorledes man kommer 
uanseet de Variationer, 
Man ser af dette Exempel, 
tilbage til den samme Vindretning, 
som optræde i de observerede Værdier af Skibets og Vin- 
dens Hastighed og Retning. 
IS 6 W—S17 W= 
S17 W—S28 W=SSW 
828 W-—S39 W=8W,S 
S39 W—S51 W=SW 
S51 W—S62 W=SW,W 
|S 62 W —S73 W=WSW 
Den i Grader opførte Vindretning omgjordes til | 
Streger efter folgende Tabel. 
ING Wie— NCU aN |N 84°K —§ 8°H =H S 
N 6H —Ni7 H=N,E |S 84 H—S73 E=E;S 
W a7 19 SN 28 13, SNNID, 19 73 1 —SOa 13) = BSD 
N28 H — N39 H=NE,N|S 62 E—--S51 H=SH,H 
N 30 JB) IN Sm 1) SIND S 51 K—S 39 H=SE 
N51 H —N62 H=NE,H|S 39 E—S28 H=SH;S 
N62 E --N73 B=ENE |S 28 B--Si7 B=SSE | 
N73 E —N84 H=H,N |S 17 E—S 6 H=S,4H 
Vindens Styrke forsogtes noteret efter Beaufort Scale. 
Det viste sig imidlertid, at Tagttagerne, uden Vejledning 
som de i Regelen vare af Sejlføring paa Skibet, ikke for- 
maaede at notere endog nogenlunde rigtig. Denne Obser- 
vation opgaves derfor, og er ikke medtaget i Observations- 
tabellerne. 
S73 W—S84 W=W;S 
From the above, it appears that the same result is 
obtained for the direction of the wind, notwithstanding the 
variation that occurs in the observed values for the speed 
and direction of the vessel and the velocity and direction 
of the wind. 
The direction of the wind, expressed in degrees, was 
converted into points, according to the following Table. 
6H —S 6W=S 
S;W 
S 84°W — N 844 W=W 
IN84 W—N73 W=W,N 
N73 W—N6z2 W=WNW 
N 62 W—N5:1 W=NW, W 
IN5: W—N3o W=NW 
N 39 W— N28 W=NW,;N 
N28 W—Ni17 W=NNW 
Ny W—N 6 WEN,W 
The force of the wind was noted, so far as possible, 
by the Beaufort Scale. Meanwhile, it was found that the 
observers, without assistance as they were from the spread 
of canvas carried by the vessel, could not note the force 
with even comparative accuracy. Such observations, there- 
fore, were relinquished, and will not be found in the Tables. 
