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How to fix a vessel's position with two bearings?

how to fix – как определять

a vessel’s position – позицию судна

with two bearings – по двум пеленгам

choose two well visible – выберите два хорошо видимых

and identified objects – и определяемых объекта

the angle between – угол между

directions on them – направлениями на них

must be close to – должен быть близок к

ninety degrees – 90 градусов

not less than thirty – не меньше, чем 30

not more than hundred fifty degrees – не больше, чем 150 градусов

take the bearing of – возьмите пеленг на

the reference point (landmark) – ориентир

with the compass – при помощи компаса

during the second observation – во время второй обсервации

notice time and lag report – отметьте время и время по лагу

compass bearings – пеленга компаса

are corrected with – корректируются при помощи

compass error – поправки компаса

work the true bearing on the map – нанесите истинный пеленг на карту

How to fix a vessel’s position with two bearings?

Fix Position with two bearings.

Choose two well visible and identified objects. (A and B)

The angle between directions on them must be close to 90 degrees (not less than 30/ not more than 150 degrees)

Take the bearing of the reference point (landmark) with the compass.

During the second observation notice time and lag report.

Compass bearings are corrected with compass error.

Work the true bearing on the map

How to fix a vessel’s position with three bearings?

how to fix – как определить

a vessel’s position – позицию судна

with three bearings – по трем пеленгам

choose three reference points – выберите три ориентира

on the coast – на берегу

the angle between bearings – угол между пеленгами

must be from sixty – должен быть от 60

to hundred twenty degrees – до 120 градусов

while taking the third bearing – во время взятия третьего пеленга

notice time and lag report – отметьте время и время по лагу

correct bearings – скорректируйте пеленга

with the help of compass error – при помощи поправки компаса

put on the map – нанесите на карту

determine the vessel position – определите позицию судна

at the point of – в точке

bearing intersection – пересечения пеленгов

How to fix a vessel’s position with three bearings?

Fix vessel position with 3 bearings.

Choose three reference points (landmarks) on the coast.

The angle between bearings must be from 60 to 120 degrees.

While taking the third bearing notice time and lag report.

Correct bearings with the help of compass error.

Put on the map.

Determine the vessel position at the point of bearing intersection.

What are the reasons for the triangle of errors?

What is the solution?

reasons – причины

misidentification of the landmark – неверное определение ориентиров

bearing accidental errors – случайные ошибки пеленга

taking bearings at the same time – взятие пеленгов в то же самое время

from all three points – на все три ориентира

high speed – высокая скорость

two-three miles till you reach the objects – 2-3 мили до достижения объектов

solution to triangle – решение треугольника ошибок

the true point – истинная точка

is the intersection of medians – пересечение медиан

inside of this triangle – внутри треугольника

What are the reasons for the triangle of errors?

What is the solution?

Triangle of errors.

Reasons:

misidentification of the landmark

bearing accidental errors

errors while taking bearings at the same time (from all three points)

High speed (more than 15-18 nautical knots)

2-3 miles till you reach the objects

Solution to triangle.

The true point is the intersection of medians inside of this triangle.