a Fathometer measures the sea depth
fathometer is an instrument used to measure the altitude of na object above a fixed level , fathometer measures the sea depth
The fathometer is a kind of sonic depth finder. A fathometer will display water depth and make an automatic permanent record of measurement.
ocean depth
Ocean depth
Fessenden's InventionsHe invented the radio and Fathometer
To know water depths you need a fathometer. For navigation GPS is recomended.
The first echo sounder, called the fathometer, was first developed in 1914. It was created by R.A. Fessenden, initially created to detect icebergs.
They are organised into categories. Those categories are: Database functions Date and time functions Engineering functions Financial functions Information functions Logical functions Lookup and reference functions Math and trigonometry functions Statistical functions Text functions External functions Cube functions
There are infinitely many types of functions. For example: Discrete function, Continuous functions, Differentiable functions, Monotonic functions, Odd functions, Even functions, Invertible functions. Another way of classifying them gives: Logarithmic functions, Inverse functions, Algebraic functions, Trigonometric functions, Exponential functions, Hyperbolic functions.
Basic Concept: Fathometer surveys determine water depths by repeatedly transmitting seismic energy through the water column and recording the arrival time of the reflected energy from the water bottom. The instrument calculates the water depth from these data and prints a depth value as a continuous graphic profile. Most fathometers use a narrow bandwidth 200 kHz seismic signal. They provide accurate depth information, but very little information about the subbottom. Fathometers that use a lower frequency, e.g., 20 kHz, can detect reflections from subbottom interfaces such as the bottom of an infilled scour hole.
You could not really classify formulas into types as the amount of formulas are infinite and you can have a variety of things happening in a formula. Functions come in categories, and that is maybe what you mean. It will depend on which version of Excel you have, but these are the categories available in later versions: Cube functions Database functions Date and time functions Engineering functions Financial functions Information functions Logical functions Lookup and reference functions Math and trigonometry functions Statistical functions Text functions
They are both statistical functions.