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112a1772-2da5-4e1c-b2a5-42a2c7f8ca3e |
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2025-07-03 07:46:46.108000
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Drøbaksundet
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Drøbaksundet
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<p>The current alternates with the tide, but is otherwise largely dependent on the meteorological conditions. Strong southerly winds give a northward flowing current. The current is particularly noticeable in the narrow <a href="ssr:571089" data-county="Akershus" data-lat="59.67315" data-lng="10.6161" data-municipality="Frogn" data-type="Sund i sjø">Drøbaksundet</a>, where the red spar buoy on <a href="ssr:307869" data-county="Akershus" data-lat="59.66693" data-lng="10.62064" data-municipality="Frogn" data-type="Grunne i sjø">Drøbakgrunnen</a> is often pulled under the water by the current. The current often runs in different directions along the shore and in the middle of the fjord.</p>
<p> The depth in <a href="ssr:571089" data-county="Akershus" data-lat="59.67315" data-lng="10.6161" data-municipality="Frogn" data-type="Sund i sjø">Drøbaksundet</a> is about 15 m when you keep a little closer to the spar buoy (BY) at <a href="ssr:307869" data-county="Akershus" data-lat="59.66693" data-lng="10.62064" data-municipality="Frogn" data-type="Grunne i sjø">Drøbakgrunnen</a> than the red spar buoy at <a href="ssr:368883" data-county="Akershus" data-lat="59.6651" data-lng="10.61229" data-municipality="Frogn" data-type="Holmegruppe i sjø">Småskjær</a>.</p>
<p>With the E-edge of <a href="ssr:571086" data-county="Akershus" data-lat="59.67843" data-lng="10.60666" data-municipality="Frogn" data-type="Øy i sjø">Nordre Kaholmen</a> (near <a href="ssr:610870" data-county="Akershus" data-lat="59.67861" data-lng="10.60873" data-municipality="Frogn" data-type="Fyrlykt">Kaholmen lykt</a> (light)) aligned with <a href="ssr:853804" data-county="Akershus" data-lat="59.70926" data-lng="10.58908" data-municipality="Frogn" data-type="Fyrlykt">Storegrunnen lykt</a> (light), one can pass W of <a href="ssr:307869" data-county="Akershus" data-lat="59.66693" data-lng="10.62064" data-municipality="Frogn" data-type="Grunne i sjø">Drøbakgrunnen</a> with a depth of 18-19 meters.</p>
<p>From <a href="ssr:246835" data-county="Akershus" data-lat="59.67405" data-lng="10.60711" data-municipality="Frogn" data-type="Øy i sjø">Søndre Kaholmen</a> and southwards to <a href="ssr:368883" data-county="Akershus" data-lat="59.6651" data-lng="10.61229" data-municipality="Frogn" data-type="Holmegruppe i sjø">Småskjær</a> and further west to the mainland, there is a ridge at about 1 meter depth, <a href="ssr:985564" data-county="Akershus" data-lat="59.66379" data-lng="10.60624" data-municipality="Asker" data-type="Rygg i sjø">Drøbaksjeteen</a>. Sjeteen is a 1500-meter-long underwater stone wall built by prisoners sentenced to forced labor between the years 1874-1879. The stone blocks were blasted out with black powder in the mountains at Nesset and Verpen on the Hurumlandet.</p>
<p>The wall now has 2 openings (see harbour diagram). The old, S of <a href="ssr:246835" data-county="Akershus" data-lat="59.67405" data-lng="10.60711" data-municipality="Frogn" data-type="Øy i sjø">Søndre Kaholmen</a>, between red and green spar buoys, about 8 m deep, and the new "Hurumspassasjen" right in at Hurumlandet. "Hurumspassasjen" which was formerly a passage for small boats was extended on 1 July 2005 to 50 m width and 4 m depth. The opening is marked with red and green lights.</p>
<h3>Law Data</h3>
<p>See <a href="https://lovdata.no/">lovdata.no</a> to read:</p>
<p><strong>Regulation on the use of the sea traffic control area and the use of specific waters</strong> (Sea Traffic Regulations), regarding permission to use the waters and capacity restrictions.</p>
<p><strong>Regulation on changes in the regulation on speed limits at sea.</strong></p>
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<p>Strømmen veksler med tidevannet, men er ellers i høy grad avhengig av de meteorologiske forhold. Sterk S-lig vind gir N-gående strøm. Strømmen er særlig merkbar i det trange Drøbaksundet , hvor det ofte hender at den røde staken på <a href="ssr:307869" data-county="Akershus" data-lat="59.66693" data-lng="10.62064" data-municipality="Frogn" data-type="Grunne i sjø">Drøbakgrunnen</a> trekkes under vann av strømmen. Ofte kan strømmen gå hver sin vei langs land og midt i fjorden. </p>
<p>Dybden i Drøbaksundet er ca 15 m når man holder litt nærmere bøye-staken (BY) ved <a href="ssr:307869" data-county="Akershus" data-lat="59.66693" data-lng="10.62064" data-municipality="Frogn" data-type="Grunne i sjø">Drøbakgrunnen</a> enn den rød staken ved <a href="ssr:368883" data-county="Akershus" data-lat="59.6651" data-lng="10.61229" data-municipality="Frogn" data-type="Holmegruppe i sjø">Småskjær</a>. </p>
<p>Med E-kanten av <a href="ssr:571086" data-county="Akershus" data-lat="59.67843" data-lng="10.60666" data-municipality="Frogn" data-type="Øy i sjø">Nordre Kaholmen</a> (ved <a href="ssr:610870" data-county="Akershus" data-lat="59.67861" data-lng="10.60873" data-municipality="Frogn" data-type="Fyrlykt">Kaholmen lykt</a> ) overett med <a href="ssr:853804" data-county="Akershus" data-lat="59.70926" data-lng="10.58908" data-municipality="Frogn" data-type="Fyrlykt">Storegrunnen lykt</a> kan man passere W av <a href="ssr:307869" data-county="Akershus" data-lat="59.66693" data-lng="10.62064" data-municipality="Frogn" data-type="Grunne i sjø">Drøbakgrunnen</a> med dybde på 18-19 m.</p>
<p>Fra <a href="ssr:246835" data-county="Akershus" data-lat="59.67405" data-lng="10.60711" data-municipality="Frogn" data-type="Øy i sjø">Søndre Kaholmen</a> og S-over til <a href="ssr:368883" data-county="Akershus" data-lat="59.6651" data-lng="10.61229" data-municipality="Frogn" data-type="Holmegruppe i sjø">Småskjær</a> og videre W-over til fastlandet, går det en rygg på ca 1 m dybde, <a href="ssr:985564" data-county="Akershus" data-lat="59.66379" data-lng="10.60624" data-municipality="Asker" data-type="Rygg i sjø">Drøbaksjeteen</a> . Sjeteen er 1500 meter lang undervanns steinmur, bygget av fanger idømt tvangsarbeid i årene 1874 – 1879. Steinblokkene ble sprengt ut med svartkrutt i fjellet på Nesset og i Verpen på Hurumlandet.</p>
<p>Sjeteen har nå fått 2 åpninger (se havneskisse). Den gamle, S for <a href="ssr:246835" data-county="Akershus" data-lat="59.67405" data-lng="10.60711" data-municipality="Frogn" data-type="Øy i sjø">Søndre Kaholmen</a>, mellom rød og grønn stake, ca 8 m dypt og den nye Hurumspassasjen helt inne ved Hurumlandet. Åpningen er merket med rødt og grønt lys (lykt).</p>
<h3>Lovdata</h3>
<p>Se <a href="https://lovdata.no/">lovdata.no</a> for å lese:</p>
<p><strong>Forskrift om bruk av sjøtrafikksentralenes tjenesteområde og bruk av bestemte farvann </strong>(Sjøtrafikkforskriften), vedrørende tillatelse til å benytte farvannet og kapasitetsbegrensninger.</p>
<p><strong>Forskrift om endring i forskrift om fartsbegrensning i sjøen.</strong></p>
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