an average level for the surface the Earth's oceans from which heights such as elevations may be measured
Mean Sea Level (MSL) is
Dead reckoning (DR) position is
the process of calculating one's current position by using a previously determined position, or fix, and advancing that position based upon known or estimated speeds over elapsed time, and course
a unit of length defined as being 0.3048 m exactly, it is subdivided into 12 inches
A Foot is
scale and the relationship between chart and earth distances is
the ratio of a given chart length to the actual distance on the Earth that it represents
the length of the arc of a great circle which subtends an angle of 1' (minute) of a degree at the centre of the Earth and is equal to 6,076 feet (1,852 meters)
Q: You have been asked for a Radio check, Your Reply to test transmissions should be as follows: The identification of the station calling The identification of the station replying Information regarding the readability of Perfectly Readable with the readability Scale of?
5
Q: You have been asked for a Radio check, Readable, but with difficulty is the readability Scale of?
3
Speechless technique using unmodulated - YES or AFFIRMATIVE