Seaman personal blog

Indonesian seafarer

Browsing Posts tagged navigasi

Oleh Mas Edy

Onshore, 1 March 2010

Maps atau peta bagi saya sangan penting sekali, entah karena saya sebagai seorang pelaut dan bekerja di kapal yang selalu berhubungan dengan peta.

Ovi maps dan Google maps mungkin dari sebagian kita lebih mengenal nama google karena google sudah menjadi icon dunia internet. Sedangkan ovi maps, barangkali hanya sebagian orang saja terutama para pengguna handsets Nokia sudah tidak asing lagi. Tetapi tidak menutup kemungkinan juga para pengguna Nokia belum tentu mengoptimalkan handset nya pada hal, handset terbaru saat ini sudah mendukung banyak hal yang tidak hanya sekedar alat telepon biasa.

Ovi maps adalah sebuah aplikasi besutan Nokia, dan Google maps lebih kepada free aplication untuk kebutuhan mobile khalayak umum pengguna mobile divice. Dari kedua maps ini, saya akan bercerita sedikit mengenai pengalaman saya menggunakan nya. Ovi maps sendiri masih disebut nokia maps waktu itu setahu saya di kenalkan oleh nokia N95 keluaran pertama. Sedangkan google maps saya baru menggunakan nya kira-kira akhir tahun 2008. Saya mendapatkannya  waktu itu iseng-iseng menggunakan hp saya untuk googling dan tidak sengaja saya mendapatkan link download google maps di http://m.google.com/latitude Karena saya mengetahui google maps hanya membukanya dari pc, maka saya pun lumayan gembira wahh.. sekarang google maps bisa di download dan di instal ke handphone.

Di rangkum oleh Mas Edy

On shore, 6 February 2010

Mates were in high demand during World War II.

The International Regulations for Preventing Collisions at Sea are a cornerstone of safe watchkeeping. Safety requires that one live these rules and follow the principles of safe watchkeeping. Maximizing bridge teamwork, including Bridge Resource Management is an emerging focus in watchkeeping.

The main purpose for Radar and Automatic Radar Plotting Aids (ARPA) on a ship’s bridge are to move safely among other vessels. These tools help to accurately judge information about prominent objects in the vicinity, such as:

• range, bearing, course and speed

• time and distance of closest point of approach

• course and speed changes

These factors help the officer apply the COLREGS to safely maneuver in the vicinity of obstructions and other ships.

Unfortunately, radar has a number of limitations, and ARPA inherits those limitations and adds a number of its own. Factors such as rain, high seas, and dense clouds can prevent radar from detecting other vessels. Conditions such as dense traffic and course and speed changes can confuse ARPA units. Finally, human errors such as inaccurate speed inputs and confusion between true and relative vectors add to the limitations of the radar/ARPA suite.

The radar operator must be able to optimize system settings and detect divergences between an ARPA system and reality. Information obtained from radar and ARPA has to be treated with scrutiny: over reliance on these systems has sunk ships. The officer must understand system performance. Examples include limitations and accuracy, tracking capabilities and limitations, and processing delays, and the use of operational warnings and system tests.

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