An Electromagnetic Log, sometimes called an "EM log", is an electronic sensor which measures the speed of a vessel through sea water. Like many other technologies, its name derives from the traditional chip log. It makes use of Faraday's law of induction by measuring the EMF induced in water moving through a magnetic field generated by the sensor.

In this article you will learn about a piece of equipment known as the electromagnetic log and its use on board a marine vessel. Known as EM for short, the electromagnetic log measures the speed of the ship.

Sep 14, 2019 · Electromagnetic Speed Log - Explanation with Diagrams. Construction, Working, Principle, Errors & Limitations of Electromagnetic Speed Log.

Jun 23, 2022 · Slog库是一个采用MIT License协议开源的、小巧的嵌入式log库，纯C语言实现，可以方便的进行移植、使用。支持log输出等级控制功能、log重定向功能、彩色log输出功能，使用灵活方便、简单快捷。

Mar 11, 2025 · It is an electronic sensor that measures the speed of a vessel through sea water 1. The name derives from the traditional chip log 1. This technology makes use of Faraday’s law of induction by measuring the electromotive force (EMF) induced in water moving through a magnetic field generated by the sensor 1.

Em Log is a type of Speed Log which is used to measure the speed of a ship. EM log works on the principle that when any conductor cuts through a magnetic field, a small EMF will be induced within the conductor. In this log, the sea water, which is a good conductor of electricity cuts through a magnetic field and an EMF is induced.

The SKIPPER Compact EML224 is a single or dual axis speed log, working on the electromagnetic principle, providing longitudinal and transversal ship’s speed relative to sea water. The Compact EML224 gives accurate navigation parameters, measured as they happen, and presented in a logical, user friendly way.

The Electromagnetic (EM) Underwater Log System Mk 4 is an underwater speed measuring system that provides ownship speed and distance-traveled relative to the water. The EM Log System determines speed and distance traveled from an electromagnetic flow-sensing device which produces a voltage proportional to ship's speed through the water that is ...

em.mdp文件：Gromacs用*.mdp 文件指定所有计算的参数。 它用 最速下降法 消除原子位置碰撞。编辑文件，将 nsteps 变成400。如果最小化不能收敛，就用nsteps=500 再做一次。（最小化在400步内一般是能收敛的，但不同的平台可能结果会不一样。

The EML900 series electromagnetic log conforms to the technical requirements for the performance standard determined by IMO Resolution A824(19) and MSC.96(72), and also meets type approval issued by the Transport Ministry of JG.