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14
Tid som den. Dybde, paa hvilken der kan opereres, er
betydelig. frembyder Sognefjorden, der i sin ydre Del.
udenfor Lad vik, er over 660 Favne dyb.
Til Udførelsen af den Plan. i denne Del af
Sognefjorden at foretage de første forløbige Arbejder, knytter
sig den Interesse, som Undersøgelsen af Forholdene i
Sognefjorden har, navnlig i zoologisk Henseende, i hvilken
Retning Fjorden endnu er meget lidet undersøgt. Som bekjendt
danner Sognefjorden ved sin ringe Dybde i Mundingen et
fra Havet temmelig afsluttet Dybbassin.
Da der mellem det paapegede Punkt af Sognefjorden
og Utvær kun er liden Afstand, vil man. naar
Vejrforholdene falde ugunstige for de magnetiske Observationer paa
dette Sted, med Lethed kunne benytte Tiden til Øvelserne
i Sognefjorden og saaledes kunne gjøre Regning paa at faa
begge disse forberedende Arbejder udførte i en rimelig Tid.
Efterat man saaledes har vundet det [fornødne
Kjendskab til Apparaterne og Øvelse i Brugen af dem i smult
Vand. kræves, at man vinder Erfaring i deres Anvendelse
paa Søen, i mindre roligt Vejr. De hertil fornødne
Øvelser antages at kunne, paa den mest frugtbringende Maade,
forenes med Udførelsen af Expeditionens egentlige ’Øjemed,
ved følgende Ordning af Arbejdet.
Den dybe Rencle, der ligger udenfor den norske Kyst
fra Skagerak til Ståt, fjerner sig her fra Kysten og synes
at udmunde i Ishavsdybet. Der foreligger imidlertid
Temperaturiagttagelser. der tyde hen paa Muligheden af. at
Renden grunder op eller lukker sig. Undersøgelsen af
dette Punkt vil derfor udgjøre en passende Gjenstand for
Expeditionens Begyndelsesarbejder. Ved at følge Rendens
Bund fra Sognefjorden af nordover og undersøge dens
Forhold udenfor Ståt og Romsdalskysten har man Fordelen af
at være paa Søen i et Farvand, hvor Naturforholdene
tilstede Apparaternes Anvendelse i forskjellige Retninger og
hvor Undersøgelsernes Resultater ville blive baade instructive
for Iagttagerne og oplysende tor Videnskaben, og hvor man
ikke er længere fra Land, end at man med Lethed vil
kunne søge dette, for at iverksætte mulige Udbedringer
eller ønskelige Forbedringer af Apparaterne, som Erfaring
maatte vise det hensigtsmæssigt at foretage, førend man
tiltræder Rejsen til fjernere Egne.
Efterat man saaledes havde vundet Erfaring i Søen
og faaet undersøgt det Parti af de norske Kystbanker,
hvorpaa Expeditionens videre Undersøgelser maa støtte sig.
maatte man. forat komplettere Udrustningen for et længere
Togt. anløbe en støire Havn. t. Ex. Kristiansund. Her
skulde Fartøjet blive at forsyne med, komplet Udrustning
af Kul og Vand, Krøno meternes Stand og Gang
bestemmes og mulige Udbedringer ved Apparaterne foretages.
Naar Expeditionen saaledes er i fuldt udrustet Stand
(antagelig omkring St. Hanstider), kunne dens Arbejder
at a considerable depth, is the Sognefjord, which in its
outer part, off Ladvik. is 660 fathoms deep.
Moreover, the selection of the Sognefjord as the tract
wherein to commence the preliminary work of the
Expedition. would afford a desirable opportunity of scientifically
exploring that region, which has hitherto been but little
investigated, in particular as regards its fauna. The
Sogne-fjord constitutes, by reason of remarkable shallowness at
its mouth, a deep basin well nigh cut off from the ocean
without.
The distance between the above-mentioned point of
the Sognefjord and Utvær being comparatively short, when
the weather did not admit of continuing the magnetic
observations in the latter locality, the time might be
advantageously employed in the Sognefjord, and there would thus
be a • fair prospect of completing both parts of the
preliminary work within a reasonable period.
Knowledge of the apparatus, and the requisite
familiarity with their use in smooth water, having tye en thus
attained, the next step will be* to acquire experience of
their application at sea in comparatively rough weather.
The practice necessary for this purpose may. it is believed,
be easily combined with the main object of the Expedition
by conducting the work as follows: —
The deep channel extending along the shores of Norway
from the Skagerak to Ståt. leaves the coast in this
locality, and would appear to disembogue into the depths of
the Arctic Ocean. Perhaps, however, inferring from
certain temperature-observations, the chauüel gradually shoals
or closes. The clearing up of this question will form a
fitting subject for the opening work of the Expedition.
By following the channel from the Sognefjord northwards,
and investigating its conditions oft’ Ståt and the coast of
Romsdalen, the Expedition . will secure the advantage of
cruising in a tract o’f ocean which admits of a manifold
use of the apparatus, and where the results of the
investigation must prove alike instructive to the observers themselves
and specially promotive of the. interests of science;’
moreover. the distance from land being comparatively short, it
will, if necessary, be easy to run in. shore, for the purpose
of repairing the apparatus, in case of accident, or of
effecting such alterations in their construction as may be found
desirable, before proceeding to more distant regions.
Having thus acquired experience in the use of the
apparatus at sea, and investigated that portion of the
Norwegian coastal banks on which the Expedition must base
•its subsequent operations, it will be necessary to touch at
one of the larger ports, for instance Christiansund. and
there complete the equipment of the vessel,—viz. by taking
in a tull supply of coal and water, examining the
chronometers. repairing, if damaged, the apparatus, and effecting
any improvements in their construction that experience
may suggest.
Then. — so soon as the vessel shall in such wise have been
fully equipped for the cruise (about the end of June), the work
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