This morning, two tankers, the HAFNIA NILE and CERES I, caught fire off the coast of #Singapore. AIS data visualised with the MarineTraffic playback tool appears to show a collision northeast of the Singaporean island of Pedra Branca.
Based on our readings of the AIS data, the oil laden Panamax-sized tanker HAFNIA NILE (9766217) had knocked into the starboard bow of the empty dark fleet VLCC called CERES I (9229439) at 14.2kn speed in the international waters of the Riau archipelago this morning. Both tankers… pic.twitter.com/x5d4aMU000
— TankerTrackers.com, Inc. (@TankerTrackers) July 19, 2024
以下內文出自: https://www.chinatimes.com/realtimenews/20240719004163-260408 The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies. Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas. The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements. With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
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