ETA ( ESTIMATE TIME ARRIVAL )

ETA ( ESTIMATE TIME ARRIVAL )

Menentukan Tempat Tiba

Rumus :

                                        Jarak    _{= waktu tiba}

                                        Speed

                                        Atau

                                        Jarak _{+ jam perhitungan x 60 (1 jam)}

                                        Speed

Contoh soal          :

                                        Tgl 26 Jam : 19.00

                                        Jarak ke….. 1089 mile

                                        Speed = 9,5 knot

Hitung ETA ? (tanggal , jam )

1089  _{= 114,6 x 19.00}

  9,5

                                = 3046 x 60

                                = 18.27

                                        26

                                          5

                                Tgl  31 jam 18.27

Jarak : speed x waktu LT = hasil : 24 = hasil (hari)

Harinya x 24 =

                                        Jam….. menit…. Detik

Example : 1.

                                        Jarak                              :               603 miles

                                        Speed                             :                 10,5 knots

                                        Waktu tolak      :             20.00

                                603 : 10,5 = 57,428571 + 20.00 = 77,428571 : 24 =

                                                 3,2261905 – 3      = 0,2261905 x 24 =

                                                 5,4285714            = 5º 25,6’ – 5 = 3^d 5^h 25,6^m

Example : 2.

                                        Ujung pandang → tanjung priok = 769 miles

                                        Speed                   =   11 knots

                                        769 _{= 69,9}

                                          11

                                         69,9 _{= 2,91}                     →            2 hari

                                         24

                                        0,91 x 24 = 21,81        →            21 jam

                                        0,81 x 60 = 48,6           →            48,6 menit

                                Kalau kurang dari 24 jam x 60 = ….. di dapat menitnya          

                                Semoga bermanfaat !