Njira Zoyendera Pogwiritsa Ntchito Mapu a M'mphepete mwa Nyanja
Kuyenda panyanja sikudalira nthawi zonse m'mphepete mwa nyanja kapena zinthu zowoneka ngati nyumba zowunikira. Pamene zombo zikuchoka pamtunda, chidziwitso chokhazikika komanso chogwirizana chimachokera ku "mawonekedwe" a pansi pa nyanja. Apa ndi pomwe mamapu a m'nyanja—omwe nthawi zambiri amatchedwa mamapu a bathymetric—amachita gawo lofunika kwambiri. Mamapu awa amawonetsa kuzama ndi kupumula kwa pansi pa nyanja kudzera mu mizere ya contour (isobaths) ndi zizindikiro zina za bathymetric, zomwe zimathandiza oyendetsa sitima kukonzekera njira, kupewa zoopsa , ndikuwunika mawonekedwe a madzi omwe amadutsa. Nkhaniyi ikufotokoza njira zoyendetsera zoyendera pogwiritsa ntchito mamapu a contour ya m'nyanja, kuyambira pamalingaliro oyambira mpaka kugwiritsa ntchito kothandiza.
Kumvetsetsa Mapu a Mzere wa Madzi (Bathymetry)
Mamapu a mizere ya m'nyanja amasonyeza kuya kwa madzi pogwiritsa ntchito mizere yolumikiza malo ofanana. Mizere iyi imatchedwa isobaths. Mizere ya mizere ikayandikira, kuzama kumasinthasintha kwambiri. Mosiyana ndi zimenezi, mizere yomwe imalekanitsidwa imasonyeza pansi pa nyanja yofewa. Izi ndizothandiza kwambiri poyesa malo otetezeka oyendera, makamaka zombo zomwe zili ndi mpweya wochuluka.
Kuwonjezera pa mizere, machati a panyanja nthawi zambiri amaphatikizaponso malo akuya (mawu), mitundu ya pansi (mchenga, matope, makorali), zopinga (matanthwe, zombo zosweka), njira zoyendera sitima, ndi zothandizira kuyenda panyanja. Zinthu zonsezi ziyenera kuwerengedwa limodzi. Cholakwika chofala ndikuyang'ana pa chifaniziro chimodzi cha kuya popanda kuganizira momwe mizere yozungulira imayendera, pomwe kwenikweni, kusintha kwa mizere nthawi zambiri kumasonyeza ngozi yomwe ikubwera.
Kudziwa Kukula ndi Kuzama kwa Detum
Musanagwiritse ntchito mapu ozungulira, onetsetsani kuti mwamvetsa kukula kwa mapu ndi deti yomwe yagwiritsidwa ntchito. Sikelo imatsimikiza mulingo wa tsatanetsatane. Mamapu akuluakulu (monga 1:25.000) ndi oyenera kuyenda pafupi ndi gombe, kulowa m'madoko, kapena kuyenda m'misewu yopapatiza. Mamapu ang'onoang'ono (monga 1:250.000) ndi oyenera kuyenda mtunda wautali, koma tsatanetsatane wa zoopsa zakomweko ukhoza kubisika.
Kuzama kwa datum ndi chizindikiro cha zero cha kuchuluka kwa kuya pa tchati, nthawi zambiri chogwirizana ndi kutsika kwa mafunde a astronomic (Chart Datum). Izi zikutanthauza kuti kuzama komwe kwasonyezedwa nthawi zambiri kumakhala kochepa "kosungira zinthu." Pa mafunde okwera, kuzama kwenikweni kungakhale kwakukulu; pa mafunde otsika kwambiri, kuzama kungakhale pafupi ndi mtengo wa tchati kapena ngakhale kucheperako chifukwa cha zinthu za mafunde, kupanikizika, ndi kusintha kwa mawonekedwe. Oyendetsa sitima abwino nthawi zonse amawonjezera malire otetezeka.
Njira Zoyambira : Kuwunika Chitetezo Chakuya (Pansi pa Keel Clearance)
Gawo loyamba pakuyenda motsatira mizere ndikuwerengera Under Keel Clearance (UKC), yomwe ndi mtunda wotsala pakati pa keel ya sitimayo ndi pansi pa nyanja. Fomula yake ndi yosavuta:
UKC = Kuzama kwenikweni – Kuyenda kwa sitimayo – Kukonza (mafunde, kukwawa, ndi zina zotero)
Kuzama kwenikweni kungayesedwe kuchokera ku kuya kwa mapu kuphatikiza kutalika kwa mafunde. Komabe, kusintha monga kutsika kwa malo a sitimayo m'madzi pamene ikuyenda ndikofunikira m'madzi osaya kapena ngalande. Ndi mapu ozungulira, mutha kusankha njira yomwe imatsatira mizere yotetezeka ya kuya, osati zomwe "zikuwoneka zowongoka."
Njira Zowerengera Ma Contour: Tsekani vs. Lole
Kuwerenga mizere ya mizere kuli kofanana ndi kuwerenga mapu a malo pamtunda, koma ndi mfundo yosiyana: manambala ang'onoang'ono amatanthauza osaya (oopsa), manambala akuluakulu amatanthauza akuya (otetezeka). Mfundo zina zofunika:
1. Ma contour otsekeka: chizindikiro cha phiri lakuthwa kapena phiri la pansi pa madzi. M'madera ngati awa, kuya kumatha kusintha mofulumira. Cholakwika malo ang'onoang'ono angapangitse sitimayo mwadzidzidzi mulowe m'madzi osaya kwambiri.
2. Mawonekedwe otayirira: pansi pake pang'onopang'ono. N'kosavuta kuyerekeza kusintha kwa kuya, koma muyenerabe kukhala maso ngati pali madontho am'deralo (shoals) kapena makorali.
3. Mizere ndi ngalande: mapangidwe a mizere omwe amapanga mawonekedwe a "U" kapena "V" omwe amatha kuwerengedwa kuti adziwe kapangidwe ka pansi. Mizere nthawi zambiri imapereka njira yotetezeka ya zombo zazikulu, pomwe mizere ikhoza kukhala zoopsa zobisika.
Mukachita masewero olimbitsa thupi, mutha "kuganizira" momwe nyanja imaonekera kuchokera m'mizere iyi, zomwe zimapangitsa kuti zisankho zoyendera zikhale zosavuta komanso zachangu.
Kukonzekera Njira ndi "Kutsatira Mizere"
Njira imodzi yomwe imagwiritsidwa ntchito kwambiri ndi kutsatira mizere, yomwe imaphatikizapo kusankha njira yofanana ndi mzere wina wakuya. Mwachitsanzo, chombo chaching'ono chomwe chikufuna kukhala chotetezeka ku miyala yamchere chingatsatire mizere ya mamita 10-15, pomwe chombo chachikulu chingafunike mizere ya mamita 30 kapena kuposerapo.
Njira zokonzekera:
- Dziwani kuzama kocheperako kotetezeka kutengera draft + UKC.
- Pezani mzere womwe ukuyimira malire otetezeka.
- Konzani njira zomwe nthawi zonse zimakhala "mkati" (zakuya) mwa malire.
- Dziwani malo ofunikira: malo otsetsereka pansi pa nyanja, malo okhala ndi mizere yopapatiza, kapena kupendekera kwa ngalande.
Njira imeneyi ndi yothandiza kwambiri m'madzi a pachilumba, m'matanthwe, kapena m'madera a miyala, komwe njira yodula kwambiri ingadutse m'mapiri osaya kwambiri.
Fufuzani ndi Echo Sounder: "Kufananiza Ma Profiles Ozama"
Mapu a contour amakhala amphamvu kwambiri akaphatikizidwa ndi echo sounder (chopezera nsomba/sonar yakuya). Mutha kufananiza kuzama kwa nthawi yeniyeni ndi komwe kwayerekezeredwa kuchokera pamapu. Ngati kusiyana kuli kofanana, kungakhale chifukwa cha:
- Kukonza kwa kukhazikitsa sikolondola,
- Dongosolo la mapu ndi losiyana ndi makina azida,
- Pali kusintha kwa pansi pa nyanja (kugwa kwa nthaka/kukokoloka kwa nthaka),
- Malo a GPS ndi olakwika kapena chithunzi cholakwika.
Njira yodziwika bwino ndiyo kupanga "mbiri" yakuya panjira. Pamene mizere ya contour ikusonyeza kutsika (kutsika kwa kuya), choyimbira mawu chiyenera kutsimikizira zomwe zikuchitika. Ngati sizikugwirizana, nthawi yomweyo ganiziraninso malo anu ndi njira yanu.
Kudziwa Malo Pogwiritsa Ntchito Ma Contours (Kukonza Ma Contour)
M'madera omwe ali ndi zizindikiro zochepa zooneka, mizere ingathandize kuwerengera malo pogwiritsa ntchito njira yotchedwa kukonza mizere: mumayerekeza kuya komwe kwayesedwa ndi mawonekedwe ozungulira mizere ndi omwe ali pamapu. Mfundo yake ndi yosavuta:
- Ngati muyeza kuzama kwina, muli pafupi ndi mzere wa kuzama komweko.
– Ndi miyeso ingapo pamene mukuyenda (monga mphindi zingapo zilizonse), mutha kuwona ngati sitimayo ikudutsa malire kapena ikuyandikira.
- Kusintha kwadzidzidzi kwa kuya kumasonyeza kuti mukuyandikira phiri kapena ngozi.
Njira imeneyi siilowa m'malo mwa GPS, koma ndi yothandiza kwambiri potsimikizira. Pakakhala kusokonezeka kwa ma signal, chifunga, kapena kulephera kwa zida zamagetsi, kutha "kuwerenga" mozama ndi luso lopulumutsa moyo.
Kuzindikira Zoopsa: Matanthwe, Mipiringidzo ya Mchenga, ndi Zombo Zosweka
Pa mapu a mizere, zoopsa nthawi zambiri zimawonetsedwa ndi kuphatikiza mizere yoyandikana, manambala ang'onoang'ono akuya, kapena zizindikiro zapadera. Madera omwe amafunikira chisamaliro chapadera:
– Mphepete mwa nyanja: kukwera kwa nthaka pansi pa nyanja komwe kumapangitsa kuti kuya kwake kuchepe mwadzidzidzi.
– Makorali: amatha kuoneka ngati malo osaya okhala ndi mawonekedwe osakhazikika.
– Zombo zosweka: nthawi zambiri zimakhala ndi chizindikiro, nthawi zina zimakhala ndi kuya kochepa pamwamba pa ngoziyo.
Mukakonzekera njira, musamangojambula mzere wowongoka. Pangani njira yotetezeka yomwe imaganizira momwe mungasunthire chifukwa cha mafunde ndi mphepo, komanso malo oti muyendemo.
Mmene Mafunde ndi Mafunde Amakhudzira Ma Contour Othandiza
Ma contour omwe ali pa tchati sasintha ola lililonse, koma momwe zinthu zimagwirira ntchito zimasintha chifukwa cha mafunde, mafunde, ndi mafunde. Mu straits yopapatiza, mafunde amatha kukankhira zombo kutuluka mu mizere yotetezeka ya contour. Chifukwa chake:
- Werengani seti yapano ndi kusuntha,
- Ganizirani mafunde pamalo opapatiza kapena osaya kwambiri,
- Chepetsani liwiro m'malo osaya kwambiri kuti muchepetse kugona pansi,
- Gwiritsani ntchito malo olowera omwe ali mbali yotetezeka ya mzere.
Mwa kuyankhula kwina, mizere ndi "mapu a malo," pomwe mafunde ndi mafunde ndi "nyengo ya malo." Zonsezi ziyenera kugwirizanitsidwa.
Zolakwa Zofala ndi Momwe Mungapewere
Zolakwika zina zomwe zimachitika nthawi zambiri mukamagwiritsa ntchito mamapu a m'nyanja:
1. Kusaganizira za datum ndi mafunde: poganiza kuti kuya kwa mapu ndiko kuya kwa pano.
2. Kunyalanyaza kukula kwa mapu: kugwiritsa ntchito mamapu ang'onoang'ono poyendetsa mwatsatanetsatane.
3. Kudalira kwambiri chida chimodzi: osayang'ana mamapu, GPS, ndi echo sounder.
4. Kusapereka malire: njirayo ili pafupi kwambiri ndi malire otetezeka a contour, ngakhale kuti mafunde amatha kukankhira sitimayo.
Yankho lake ndi njira zoyendetsera zinthu: kukonzekera njira, kuwunika nthawi zonse, komanso kukhala ndi mapulani ena okonzeka nthawi zonse.
Kutseka
Kuyenda pogwiritsa ntchito matchati a contour a panyanja ndi luso lomwe limaphatikiza kumvetsetsa kwa bathymetry, kukonzekera njira, ndi kutsimikizira munda kudzera mu kuyeza kuya. Mwa kuwerenga mizere ya contour mosamala, kusankha mizere yotetezeka yoti mutsatire, ndikufananiza deta ya echo sounder ndi tchati, oyendetsa sitima amatha kukonza chitetezo komanso magwiridwe antchito. Munthawi yamakono yoyendera, matchati amagetsi amapangitsa kuyenda kukhala kosavuta, koma mfundo ya contour imakhalabe maziko. Mukatha "kuona" mawonekedwe a pansi pa nyanja kuchokera ku mizere ya contour, simukungotsatira njira - mukumvetsa malo omwe mukuyenda.
