#Marine Antenna

[antennaexperts]

Benefits of a Marine VHF Antenna

The demand for a marine VHF antenna is increasing in the field of marine radio communication. This antenna makes communication better on marine vessels, aircraft, and FM stations. This antenna has many benefits over the other kinds of antennas. In this blog, we will discuss everything related to Marine VHF antenna and its benefits.

What is a VHF Antenna?

VHF is a very high-frequency antenna that has a higher band. It is an antenna used widely by local governments and numerous broadcasters. Many broadcasters have now changed from the HF band to the VHF band.

VHF band has a longer range than the HF band. This is one of the major reasons why many FM stations, marine vessels, and TV channels use a VHF band antenna. It gives a better quality and reduces minimal radio interference. Moreover, this antenna delivers the best performance in marine communication.

What is a Marine VHF Antenna?

Now, we will further discuss the meaning of Marine VHF antenna. This antenna is used in many kinds of boats, ships, yacht to cruise for radio communications and broadcasting signals. It also helps to receive and transmit radio signals over a long distance. These antennas allow boats to communicate well with each other and radio stations.

The fixed VHF radio has a typical ship-to-ship range of about 20 km. It is a portable antenna that can be carried anywhere during the journey. The range of a marine VHF antenna will increase with the increase of sea level or Antenna.

Benefits of Marine VHF Antenna

Marine VHF antenna is a very useful component that helps in transmitting and receiving radio signals over long distances. It allows the boats & ships to communicate with each other over a long distance and radio stations. Now, let us have a look at the major benefits of a Marine or VHF Ship board antenna in the below section:

1. Reduces Radio Interference

One of the major benefits of using a marine antenna is the less radio interference. It is widely used by marine forces and merchant navy to get a better communication range. VHF antenna works better than UHF antenna to deliver the communication to longer distances. Apart from that, the antenna also works better than the UHF antenna in other stations at night. It gives a better performance than an HF antenna.

2. Gives Good Sound Quality

The biggest reason for weak marine communication is bad sound quality. A very high-frequency antenna gives better sound quality than other kinds of antennas. Precise sound quality helps to give better communication on boats and ships. Marine VHF antenna is a useful component for harbor master and ship crew.

3. Effective Transmission And Receipt of Signals

A major benefit of using a marine VHF antenna is that it receives and transmits communication signals effectively. The radiation pattern and antenna gain will change the reception and transmission of communication signals. The high gain of a marine VHF antenna will give a higher range than UHF and HF antennas.

4. Portability

VHF antennas are highly portable and affordable. They do not have any long wires or loops. Besides, the VHF antenna is also easy to store and ship to any part of the world. You can use a marine VHF antenna for two-way radio communication and weather band signals. It works better than AM or UHF antennas and receives FM radio and VHF TV stations.

5. Strong Construction

One of the major benefits of using a VHF ship board antenna or marine antenna is that it has good construction. It is developed with the help of sound materials that do not rust or corrode due to moisture, winds, sunrays, dust, or chemicals. Besides, this antenna also remains stable on any type of boat or ship while going through oceans and seas.

6. Good Performance

While HF and UHF bands give low performance, the marine VHF antenna gives a better performance than the other antennas. It takes a few minutes to set up this antenna on the boats. VHF antennas come in a variety of sizes according to the needs of the clients. They also deliver better quality signals in marine communication. Mounting this antenna is easier than other types of antennas and can be done without using any special tools.

7. Suitable For Boating

The main advantage of a VHF marine and ship board antenna is that it suits every kind of boat and ship. You can mount it on any kind and size of boat and ship. There are no barriers in marine radio communication due to which you can use VHF antenna on ships and boats.

8. Better 2-Way Communication

Marine VHF antenna gives a powerful two-way radio communication on boats. You can communicate effectively from vessel to vessel and vessel to shore after mounting this antenna on the ship vessels and boats. Marine bands and VHF marine antennas are developed to work at the different frequencies on ships and vessels.

How to Buy a Marine VHF Antenna?

If you want to buy a VHF antenna, consider certain things and specifications before purchasing it. Besides, you must also consider certain things while purchasing a marine VHF antenna such as:

The first thing to consider is the length of an antenna. This length will ultimately affect the communication range and gives a longer range than other kinds of antennas.

The next factor to look for it mounting style while buying a marine VHF antenna. It can be mounted according to the needs and size of your ship vessel or boat.

You must look at the transmission pattern while buying the marine VHF antenna. If you want the better VHF communication range, choose the antenna with higher decibel rating.

You must look at the various options and compare the cost of a marine VHF antenna.

You should see whether the antenna fits in your budget or not.

The most important thing to look for while choosing a marine VHF antenna is the experience of using it on vessels and boats. You must check whether it is safe to mount the antenna on vessels and boats.

[toacody]

Meteor Shrimp

Faster than a speeding bullet!

Source

Creator: FeliusDax

[stellarmothe]

Sketch of blob hair character I made earlier, I decided to give them an actual purpose as a medic/ doctor and name them cyn. Their hair can be regenerated and helps wounds heal faster :)

[saym0-0]

bumblebee holoform take 2. i like this one a whole better now, i feel like the outfit fits the vibe i was going for a lot better hehe

the car was admittedly traced from the screenshot below, from the 2007 movie, and the whole thing kinda turned into a colour study of that scene because i just really love the lighting in that film, its so pretty :33

i kinda just had fun with it towards the end though with all the scribbly bits haha

close ups:

sorry for the low res, i drew it really tiny on the canvas 🤭🤭

[marsuro]

Huetobervember day 17

LOBTER PARTY

[subbalakshmisastry]

Marine Animals Lobsters

[lynaferns]

(TW: Fish gore and internals)

Colorless, human design and some info under the cut.

So, the mer AU.

Some species of mermaids are known to haunt humans when they are hungry, other species don't. Sirens are known to sing (or scream at the sky, if you want to call it that) when a storm is coming.

Sun is inspired by flying fish, and the tongue by a sea butterfly's mouth. (because of the "wing" fins I would consider him a siren, but a lot of mythological creatures are called sirens so idk). He's clingy and an attention hoarder.

Moon is inspired by abyssal fish, lophiiformes (specifically those with antennas) and black dragon fish. He's pretty chill as long as is well fed. He purposely creeps out others with his antennas, and hates Sun's tongue thing.

And Eclipse is inspired by axolotls and leafy sea dragons. They're pretty pacific but won't hesitate in defending themselves when they can't find a way out. Their tail is strong, they can send you flying across the room.

Here is the human design (my selfinsert, Fern) + outfits and a size chart of them long boys.

In this AU Fern is a student at a marine biology university. They conserve and rescue marine life. Some of the rescued especies being the celestial trio, which were assigned under Ferns care with help from another student.

Some images of the three together in one picture that were supposed to be the header of the post but didn't decide which to chose so I'm putting here my 5 favourites. They don't quite fit well 'cuz I drew them separately.

[satelite1]

VSAT services provide reliable, high-speed satellite internet access to ships, allowing them to stay connected while at sea. With VSAT services, maritime vessels can stay in touch with crew and operations onshore, as well as access real-time data and applications that help them operate more efficiently.

[cocosummer]

sum: after taking a much-needed nap together, the hydro dragon neuvillette has you in his coil and is reluctant to let you go. hm.

pairing: neuvillette x gn!reader

cws: nothin but fluff

a rich, brooding purr rose in neuvillette’s throat when you groggily came to and raised your head from his chest; the noise he made was warm, but also poignant like the warning clicks of dolphins. ‘stay,’ he was coaxing you.

his heavy tail curled further over your torso; he’d assumed you in a protective coil, close to himself, and turned his divine dragon form into a sort of nest for you to sleep in. his pearlescent scales were smooth, almost silken to the touch, and though his tail was almost entirely muscle, it stretched soft and pliant around your body.

the hydro dragon is a cold-blooded creature, whose internal temperature had been completely reliant on the ocean currents he‘d ridden freely during the early days of teyvat.

and throughout the abyssal waters, teeming with all kinds of marine life, there had never been a creature who’d offered him warmth.. someone like you. 

so the sensation of your warmth was addicting to him. neuvillette clasped you tightly to himself (though not tightly enough that you couldn’t breathe), the light pressure of your head laying flush against his chest now as much of a requirement for him as sunlight from the sky. he could feel every clench and twinge and burst of momentum in your muscles, sending waves of heat through his body, and he hoped you wouldn’t notice his heart pattering a bit faster each time you shifted. 

his curled blue antennae had gradually floated down towards you as you slept. 

and something about the sound of your startled laugh when one antenna traced down your soft cheek or fluttered over your eyes made him incline his head and want to observe you closer.

“i guess i can stay a bit longer,” you rub your forefinger up and down the slope of neuvillette’s snout lightly. he blows a brief gust of air into your face, his nostrils flaring, and suddenly it felt as if you were at a beach. with a sea breeze, carrying hints of salt and kelp and sand, flowing around you

you could hear it through his gestures, through the way his heartbeat slowed as soon as you relaxed into his embrace once again, through the soft growls and purring that he ellicited in an effort to calm you and keep you near.. the hydro dragon had quickly come to need you. and for neuvillette.. it gave him a strange feeling, he thought, to be in possession of a warm little light such as yourself.. to have experienced the very human desire for a moment with someone to never end.. and perhaps he was adjusting well to surface life after all. because he liked what he was feeling, very much

[bestanimal]

Round 2 - Arthropoda - Malacostraca

(Sources - 1, 2, 3, 4)

Malacostraca is the second largest class of crustaceans, and what most people picture when they hear the word crustacean! It contains over 40,000 species separated into 17 orders: Leptostraca, Stomatopoda (“Mantis Shrimp”), Decapoda (“Crabs”, “Lobsters”, “Crayfish”, “Shrimp”, and “Prawns”), Euphausiacea (“Krill”), Thermosbaenacea, Mysida (“Opossum Shrimp”), Stygiomysida, Lophogastrida, Spelaeogriphacea, Mictacea, Bochusacea, Cumacea (“Hooded/Comma Shrimp”), Tanaidacea, Amphipoda, Isopoda, Anaspidacea, and Bathynellacea. Many are scavengers, some are predators, some are herbivores, some are filter feeders, and some are parasites.

Malacostracans live worldwide, in marine, freshwater, and terrestrial environments, and have a large diversity of body forms. They are united by their segmentation of 20-21 body segments divided into a 5-segmented head, an 8-segmented thorax, and a 6-segmented abdomen with a telson, except in Leptostraca which has 7 abdominal segments. They have a pair of jointed appendages on each abdominal segment, though some groups have lost them secondarily. In some, three thoracic segments may be fused with the head to form a cephalothorax, the associated legs becoming maxillipeds. They have two pairs of antennae, which often branch into two parts. Their mouthparts have a pair of mandibles, maxillules, and maxillae. Many taxa have compound eyes on moveable stalks. Some have a carapace which covers the head, part or all of the thorax and some of the abdomen. The carapace may be fused with some of the thoraacic segments or hinged with two parts. This is one of the most diverse classes in the animal kingdom, and their anatomy and behavior would be hard to summarize further in just one paragraph!

The oldest malacostracans are the Leptostracans, which first appeared as fossils from the Cambrian period.

Propaganda under the cut:

“Carcinisation” has become a meme meaning “everything becomes crab”, but it actually only refers to the phenomenon of decapods convergently evolving crab-like anatomy. The Infraorder Brachyura contains the “True Crabs”, but at least 5 groups of unrelated decapods have evolved similar anatomy: a flat and broad cephalothorax.

Stomatopods (“Mantis Shrimp”) are known for their excellent color vision, but they probably can not actually see “shrimp colors.” They can see ultraviolet and polarized light, but their excess of photoreceptor cells actually lets them process their environment faster than we can, rather than differentiate between a multitude of different colors. This allows them to have quick reaction times, either to escape predators, fight or flee from rivals, or strike at their prey with amazing speed.

Malacostraca contains the largest living arthropods: the Japanese Spider Crab (Macrocheira kaempferi) with a legspan of up to 4 metres (13 ft) long, and the American Lobster (Homarus americanus), which can get up to 20 kilograms (44 lb).

Many species of malacostracans are commonly kept as pets, including crabs, crayfish, shrimp, mantis shrimp, and isopods.

Cute creb eat a cherry:

[rfantennaindia]

RF Antenna

Eteily is well known brand in India for RF Antenna Radio frequency Antenna. Radio frequencies from DC to 18GHz and RF Families like IoT Antenna, 868MHz Antenna, LoRa Antenna, 433MHz Antenna,5G Antenna, LTE Antenna, 4G Antenna, WCDMA 3G Antenna, 5.8GHz Antenna, 2.4GHz Antenna, Bluetooth Antenna, RF Antenna Solutions, Cellular Antenna, General ISM Antenna, Navigation Antenna, Wi-Fi Antenna, and 802.15 Antenna. 

[wonders-of-the-cosmos]

Mariner program

The Mariner program was conducted by the American space agency NASA to explore other planets. Between 1962 and late 1973, NASA's Jet Propulsion Laboratory (JPL) designed and built 10 robotic interplanetary probes named Mariner to explore the inner Solar System - visiting the planets Venus, Mars and Mercury for the first time, and returning to Venus and Mars for additional close observations.

The program included a number of interplanetary firsts, including the first planetary flyby, the planetary orbiter, and the first gravity assist maneuver. Of the 10 vehicles in the Mariner series, seven were successful, forming the starting point for many subsequent NASA/JPL space probe programs. 

The name of the Mariner program was decided in "May 1960-at the suggestion of Edgar M. Cortright" to have the "planetary mission probes ... patterned after nautical terms, to convey 'the impression of travel to great distances and remote lands.'" That "decision was the basis for naming Mariner, Ranger, Surveyor, and Viking probes."

Each spacecraft was to carry solar panels that would be pointed toward the Sun and a dish antenna that would be pointed at Earth. Each would also carry a host of scientific instruments. Some of the instruments, such as cameras, would need to be pointed at the target body it was studying. Other instruments were non-directional and studied phenomena such as magnetic fields and charged particles. JPL engineers proposed to make the Mariners "three-axis-stabilized," meaning that unlike other space probes they would not spin.

Mariner 1 and Mariner 2

Mariner 1 and Mariner 2 were two deep-space probes making up NASA's Mariner-R project. The primary goal of the project was to develop and launch two spacecraft sequentially to the near vicinity of Venus, receive communications from the spacecraft and to perform radiometric temperature measurements of the planet. A secondary objective was to make interplanetary magnetic field and/or particle measurements on the way to, and in the vicinity of, Venus.

Animation of Mariner 2's trajectory from August 27, 1962, to December 31, 1962. Mariner 2 · Venus · Earth.

Mariners 3 and 4

Sisterships Mariner 3 and Mariner 4 were Mars flyby missions.

Mariner 3 was launched on November 5, 1964, but the shroud encasing the spacecraft atop its rocket failed to open properly and Mariner 3 did not get to Mars.

Mariner 4, launched on November 28, 1964, was the first successful flyby of the planet Mars and gave the first glimpse of Mars at close range

This archival image is an enhanced contrast version of the first Mars photograph released on July 15, 1965. This is man's first close-up photograph of another planet -- a photographic representation of digital data radioed from Mars by the Mariner 4 spacecraft. Data was either sent to Earth immediately for acquisition or stored on an onboard tape recorder for later transmission.

The pictures, played back from a small tape recorder over a long period, showed lunar-type impact craters (just beginning to be photographed at close range from the Moon), some of them touched with frost in the chill Martian evening. 

Mariner 5

The Mariner 5 spacecraft was launched to Venus on June 14, 1967, and arrived in the vicinity of the planet in October 1967. It carried a complement of experiments to probe Venus' atmosphere with radio waves, scan its brightness in ultraviolet light, and sample the solar particles and magnetic field fluctuations above the planet.

Mariners 6 and 7

Mariners 6 and 7 were identical teammates in a two-spacecraft mission to Mars. Mariner 6 was launched on February 24, 1969, followed by Mariner 7 on March 21, 1969. They flew over the equator and southern hemisphere of the planet Mars.

Mariners 8 and 9

Mariner 8 and Mariner 9 were identical sister craft designed to map the Martian surface simultaneously, but Mariner 8 was lost in a launch vehicle failure. Mariner 9 was launched in May 1971 and became the first artificial satellite of Mars. 

Mariner 10

The Mariner 10 spacecraft launched on November 3, 1973, and was the first to use a gravity assist trajectory, accelerating as it entered the gravitational influence of Venus, then being flung by the planet's gravity onto a slightly different course to reach Mercury. It was also the first spacecraft to encounter two planets at close range, and for 33 years the only spacecraft to photograph Mercury in closeup.

Venus in real colors, processed from clear and blue filtered Mariner 10 images

Mariner 10's photograph of Venus in ultraviolet light (photo color-enhanced to simulate Venus's natural color as the human eye would see it)

This mosaic shows the planet Mercury as seen by Mariner 10 as it sped away from the planet on March 29, 1974.

source x, x | images x

[hartlesshart]

By @kelsochronicles and hart!

Hello! It has come to our attention that some of you may have trouble telling us apart.

The Sun will illuminate your path as we have come up with a solution! Lets cast off:

Now, bask in the luminance of our faces

If you've looked at us for more than 2 seconds and you’re not sure - don't panic, we won’t report you to Compliance - take a step back and don't post/reblog on socials or say anything out loud. All hunters need to regroup from time to time.

Next, ponytails. One of our most defining traits that no one in the world ever wears.

You’ll see that Talanah’s ponytail is flame shaped and her hair is more wavy. Seyka is like a smooth cascading waterfall. On to head accessories. A good Marine takes the time to observe!

Talanah wears a crown made from machine parts. Like a bird! Seyka’s ponytail has a headpiece with little antennae. Like a moth! Oh and she has a focus on.

Finally - Tides take us, if you still can’t tell us apart - then just LOOK AT OUR OUTFITS

By the Sun, most importantly: check the tags of the original post to confirm the artist’s intention. We’re all here to celebrate these characters and they’re worth getting to know!

There you go!

BIG SHOUTOUT TO KELSO FOR THIS AMAZINGLY FUN AND CHAOTIC COLLAB!!!! Kelso gave each slide such a fun layout (and as always, absolutely slays with Talanah art!). We both adore our girls and we hope you enjoyed their special powerpoint presentation. P.S - this is a joke - we hope....

[rangerboisposts]

Crochet Prawn

For Christmas my (marine biologist) dad wanted some prawns and I could not find any free patterns anywhere so I ended up drafting my own pattern. It has since been approved by my dad despite having no rostrum or antennae (I found these too hard to look good - if anyone has any tips please let me know!).

Also this pattern is NOT made in the round and so does require sewing and has a few fiddly bits. In order to make the legs smaller than the rest of the body without changing the colour, I separated out smaller sections of the ply, much like when using embroidery floss. I'm not sure if proper crochet-ers do this but I've found it works for me as long as it is 2-ply or greater.

Full Pattern under the cut:

INGREDIENTS:

3.5mm and 2mm Crochet Hooks

6mm Safety Eyes

Pinky Yarn (Colour A)

Darker Yarn (Colour B)

METHOD:

Note: ch1 and turn between each row. inc= 2 sc in same stitch. sc2tog= sc 2 together. blo= back loops only

Changes in colour will be denoted using A! (change to colour A) and B! (change to colour B)

MAIN BODY

Using colour A and a 3.5mm hook:

Ch4

sc 3

sc 1, inc 1, sc 1

sc 1, inc 2, sc 1

sc 2, inc 2, sc 2

sc 2, inc 4, sc 2 (eyes will be inserted between row 6 & 7)

sc 12

sc 5, sc2tog, sc 5

sc 11

sc 11

sc 11

sc 11

sc 11

sc 11 in blo (this ridge separates the head from the body)

sc 11

sc 2, B! sc 7, A! sc 2

sc 5, inc, sc 5

sc2tog, sc 8, sc2tog

sc 2, B! sc 6, A! sc 2

sc2tog, sc 2, inc 2, sc 2, sc2tog

sc 10

sc 2, B! sc 6, A! sc 2

sc2tog, sc 6, sc2tog

sc 8

sc 2, B! sc 4, A! sc2

sc 8

sc2tog, sc 4, sc2tog

sc 2, B! sc 2, A! sc 2

sc2tog 3 and finish off

Now using the ridge created by the blo row (shown in picture above), slip stitch across the surface of the prawn to enhance the ridge and accentuate the difference between the head and the body. Your prawn should now look like this (folded):

TAIL x2

Note: all stitches within [] belong in same stitch

The tail might be a bit tricky as it goes up and around the foundation chain like this:

Using colour A and 3.5 mm hook:

ch 6

from 2nd chain - slst, sc, hdc, hdc, [dc, hdc, dc], hdc, hdc, sc, slst then finish off

PLEOPODS (Back Legs) x10

Separating colour A to create a 3-ply yarn and using a 2mm hook:

ch 11

from 2nd chain - sl st 10 then finish off

PEREOPODS (Front Legs) x10

Separating colour A to create a 2-ply yarn and using a 2mm hook:

ch 15 then finish off

ASSEMBLY

Secure eyes between rows 6 & 7 and weave in ends to the inside of the prawn (don't bother clipping the yarn as this can be used as extra stuffing!).

Attach tail at a slight angle at the end of prawn to get the positioning to look more realistic.

Start attaching the pleopods approx. one row back from the head ridge and one stitch in from the side, continuing attaching them ~1 row each until five are attached per side.

Attach the pereopods approx. one row forward from the head ridge and one stitch from the side, continuing to attach them every 1/2 row until five are attached per side.

Whip stitch the prawn together using colour A until you reach the end, stuffing as you go.

Congratulations, you now have your very own prawn!!

Please reblog with pictures if you make your own! And any tips and tricks to make them look even better :))))