Marport designs and manufactures catch control and net monitoring sensors, echo sounders, current profilers and sonar for the world’s fishing fleet. Our solutions improve operational efficiency, reduce waste and increase catch quality.
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Brochure

Key Benefits

Fuel Savings

Fuel is black gold these days of volatile fuel prices and burning fuel without needing to hurts. Marport gear sensors are designed to play a role as a contributing factor in maximising efficiency, targeting fishing at the most productive spots and keeping fishing time to the minimum needed to fill the fishroom while keeping your fuel bills down.

Efficiency

Time is money, and cutting down on lost time and wasted effort is the key to streamlining any fishing operation. The better the sensors on the gear and the more detailed the information reaching the skipper, the shorter the time the fishing gear has to be in the water. Our aim is to provide the essential information to keep fishing time strictly to the time needed, without wasting time or effort.

Catch Quality

Short tows are the thing. Getting the fish from the water to the fishroom as fast and as fresh as possible it what keeps quality high and prices strong. Marport’s codend sensors aim to tell you when there’s just enough fish in the gear for a prime quality haul, without needing to tow that extra half-hour to be sure.

Sustainability

In today’s world sustainability has become more than simply a buzzword; it’s an essential aspect of modern fisheries. Today’s approach is to take what you need and leave the rest. Nobody wants to slaughter any golden geese and we aim to provide skippers with the gear they need to align their catches to the needs of the market.

Compatability

Marport’s sensors have been designed from the outset to work seamlessly with other systems. We don’t see why you should have to fit an entire system when a single component needs replacing, so our sensors dovetail with other manufacturers’ sensor arrays and wheelhouse displays.

Descriptions

Seine Explorer SE150

Mounted on the lead line of a purse seine in a robust protective steel case, the Seine Explorer relays data back to the wheelhouse as a purse seine is shot away and throughout the fishing operation. It has been designed to incorporate omnidirectional uplink technology that ensures no loss of signal through- out the fishing operation, starting the moment the purse seine is shot away.

The skipper is shown an echogram of the shot as it takes place, displaying the distance to the seabed and a Scan- mar–compatible digital readout of the depth of water above and below the leadline.

For purse seining in shallow water, Marport’s Seine Ex- plorer is an essential tool that ensures the gear can be kept safely clear of ground obstructions so gear damage can be avoided, and in both deep and shallow water the upward-seeking option that provides distance to the surface gives the skipper an accurate indication of the sinking speed of the leadline.

Seine Depth Sensor SE050

Mounted on the lead line of a Seine depth sensor in a robust protective steel case, the Seine depth sensor relays data back to the wheelhouse as a purse seine is shot away and throughout the fishing operation.

It has been designed to incorporate omnidirectional uplink technology that ensures no loss of signal throughout the fishing operation, starting the moment the purse seine
is shot away.

A depth sensor does just what it says on the label, and these do so much more. Its primary function is to measure the depth of the gear relative to the surface, while also being able to relay information about the speed of the gear through the water as the gear is lifted or allowed to sink.

Seine Sounder SE100

Mounted on the lead line
of a purse seine in a robust protective steel case, the Seine Explorer relays data back to the wheelhouse
as a purse seine is shot away and throughout the fishing operation. It has been designed to incorpo- rate omnidirectional uplink technology that ensures no loss of signal throughout the fishing operation, start- ing the moment the purse seine is shot away.

The skipper is shown an echogram of the shot as it takes place, displaying the distance to the seabed and a Scanmar-compatible digital readout of the depth of water above and below the leadline.

For purse seining in shallow water, Marport’s Seine Sounder is an essential tool that ensures the gear can be kept safely clear of ground obstructions so gear damage can be avoided, and in both deep and shal- low water the upward-seeking option that provides distance to the surface gives the skipper an accurate indication of the sinking speed of the leadline.

Speed Explorer SPE155

This new addition to the Marport range combines a huge amount of function- ality in a single headline- mounted package. The new Speed Explorer unit combines the functions of a trawl eye headline sounder with a trawl speed sensor to give a comprehensive data output direct to the skipper.

As well as the depth, temperature and pitch & roll data that has become a standard option with every virtually Marport sensor, the Speed Explorer offers an echogram, boosted from 1hz to 3hz to provide three updates per second. The data feeds providing information on water flow along the direction of the tow and across it are also upgraded in this unit to send an update every three seconds instead of every twenty seconds, giving the skipper an integrated overview of the trawl’s opening, the flow and the effects of the currents around it.

Bottom Explorer BE150/150

Fixed to a trawl’s footrope, the Bottom Explorer pro- vides a constant confirm- ation that the gear is in contact with the seabed, or an indication that the trawl has risen off the ground, giving the skipper the opportunity to respond by adjusting towing speed or warp length to place the gear back were it belongs. This minimises lost fishing opportunities and ensures that the trawl is actively on the ground.

Depth, temperature and pitch & roll data are also part of the package that sends ground contact data with a 3hz update rate three times per second to the wheel- house display. Unlike systems on the market that use a mechanical arrangement to sense ground contact, Marport have opted for an acoustic approach for greater reliability.

Catch Explorer CE150/150

This downward-looking sensor is fitted on the top sheet of a codend or tunnel to all the skipper to monitor the contents of the codend in real time as the gear is fishing, providing a series of updates on the fish as they pass into the codend from the trawl mouth and through the belly.

This gives a rolling echogram image of the volume of catch in addition to the data supplied by the usual codend sensors that are triggered as a certain amount has been caught. The Catch Explorer also features depth, temperature and pitch & roll data.

Temp/depth sensors 

A depth sensor does just what it says on the label, and these do so much more. It’s primary function is to measure the depth of the gear relative to the surface, while also being able to relay information about the speed of the gear through the water as the gear is lifted or allowed to sink.

Combined with the sensor’s temperature function, this pro- vides a range of data that gives the skipper the information needed to maintain the gear depth at its optimum level for the preferred conditions for particular species.

We see the depth/temperature sensor as a time-saving tool that cuts down on time wasted with the gear at the wrong location. It has a typical battery life of between 450 and 540 hours that can be extended depending on the power settings used.

Catch sensors 

Would you shoot your gear without knowing when the trawl was starting to fill? Catch sensors have be- come key items of equip- ment, providing not just information on how fast the codend is filling up, but also giving vital indicat- ions on whether or not the gear is skewed, helping you avoid those lost tows. On top of all that, each catch sensor transmits a precise temperature reading to the wheelhouse.

Marport’s catch sensors are among the most sophisticat- ed on the market today, offering advanced single, dual or simultaneous operation to provide a reliable signal and to ensure uninterrupted communication with the gear. We provide high sensitivity and rapid response times, plus updates at 20 second intervals, along with a typical batt- ery life of between 380 and 540** hours, extendable by enabling low power functions.

Our catch sensors are programmable on board and can be used as direct replacements for 40kHz (Simrad® and Scanmar®) and 70kHz (Simrad® and Wesmar®) sensors.

Rip sensor

This is our early warning system. The Rip Sensor is designed to be fixed to a trawl’s belly or tunnel, where it sends an indicat- ion of any damage to the gear that could be letting fish escape.

The Rip Sensor operates on a 40kHz frequency, updates every 20 to 30 seconds, works all the way down to 1800 metres and has a typical battery life of 500 hours. As well as giving early warning of gear damage and loss of catch, the rip sensor also has a host of optional extra features, allowing it to transmit pitch and roll, depth and water temperature data to the wheelhouse.

Trawl Explorer TE155

Marport’s Trawl Explorer is your eye on the fishing gear, a sounder with a heavyweight suite of capabilities placed on your trawl’s headline sending a wealth of information to the wheelhouse. This starts with an echogram of the trawl opening and fish passing into the gear, as well as depth, temperature and distance to the seabed or footrope, plus a visual represen- tation of the footrope to seabed clearance if the gear is towed off the bottom.

The Trawl Explorer has a host of features for a variety of operating modes, and is a dual frequency unit. This allows the beamwidth to be selected from wide to nar- row along with the most suitable of several sounding modes to suit the conditions.

Additional options are for a pitch and roll function to provide a realistic presentation of the gear’s behaviour while trawling, and the Trawl Explorer can be fully pro- grammed on board. Fully comparable with Furuno’s CN-24 series displays, it can be a direct replacement for a CN-24 headline sounder.

Trawl Explorer TE075

When the Mini-Trawl Ex- plorer joined the Marport range, it was designed specifically with the needs of smaller vessels with modest-sized trawl gear in mind, although it also has a role as a tunnel-mounted down sounder for larger trawl gear.

Mounted on the headline, the Mini-Trawl Explorer gives the skipper an accurate image of the trawl opening and fish passing through the trawl mouth, plus depth, temperature, seabed distance and seabed clearance data.

Trawl Speed&Grid Sensor 

With a great many fisheries now subject to requirements to use selectivity devices, Marport’s latest Trawl Speed & Grid sensor is designed to give a trawler’s skipper realistic information on how a grid is performing, ensur- ing that a tow isn’t lost due to some minor malfunction that could easily have been avoided with the right infor- mation available.

The Trawl Speed & Grid sensor is capable of measuring water flow in two axes, providing flow data as well as cross-current data, allowing corrections to be made to compensate for cross-currents when towing uphill or with mismatched warp lengths that can skew trawl geometry. Speeds of up to six knots can be monitored effectively and cross-currents of up to three knots are within the sensor’s capabilities.

The sensor’s fundamental functions in monitoring water flow through and across a trawl’s tunnel are complemented by its advanced angle sensor, ensuring that the critical grid angle is maintained throughout the tow, and providing early warning of a grid becoming blocked and the target species deflected from reaching the codend. Updates for both flow and angle data are rapid.

As much as 90 hours of operation can be obtained from a single charge, with a fast charge option available when a quick turnaround is needed.

Door Spread Sensors

Marport’s MFX Door Sensors use a master and slave configuration, communicating via a trans- verse wireless link on 110 or 144kHz. The master sensor interrogates the slave on the opposite trawl door, relaying data from both sensors to the catching vessel via a wireless uplink broad- band transducer. As well as the door spread, this arrangement gives the skipper the full pic- ture of each trawl door’s performance, including pitch and roll function in two axes to indicate the inward/outward heel of each door as well as the forward/aft tilt, plus depth and water temperature.

Marport’s sensors are leaders in their field, capable of running and displaying all functions at any one time.

Trawl door sensors are crucial to maintaining stable gear geometry, optimising catching capacity while also minimising the wasted time and energy that are by-products of having skewed gear, and con- tributing to keeping gear damage to a minimum. Data updates are as frequent as every three seconds, highlighting the importance of reliable trawl door data, providing immediate warning if the door cross over each other or if one door falls flat during a tow.

As well as information on door performance itself, data from the door sensors can often be an indicator of a problem elsewhere in the gear, such as a collapsed trawl, and our sensors are designed for all types of trawling that use doors. MFX door sensor battery life is between 90 and 200 hours for the master sensor and is as high as 300 hours for the slave unit, based on a standard charging time of 8 to 12 hours.

Mini Door Spread Sensors

Designed to meet the needs of smaller trawlers towing semi-pelagic gear or flying their doors off the bottom, and using gear on which space is at a pre- mium, Marport’s multi-function XL-DD ‘Small Frame’ trawl door sensors have all the functionality of larger sensors, operating with a master and slave ar- rangement. The master sensor sends both sets of data to the catching ves- sel’s wheelhouse, with update rates of as fast as every three seconds, pro- viding the skipper with door spread, inward/outward heel, forward/aft tilt, depth and temperature data.

MFX trawl door sensors are essential for keeping the gear correctly aligned, particularly working semi-pelagic or pelagic gear in which precision is critical to controlling the fishing gear and optimising fishing opportunities, en- suring that the gear geometry is maintained and providing early warning if there is a problem with the trawl, which in turn allows skipper to compensate or haul and fix the problem without wasting time and fuel.

Battery life is typically around 90 hours, based on a standard charging time of 8 to 12 hours, although endurance can be extended by using power-saving settings.

Door Sounder

This lightweight trawl door sensor has been developed specifically for trawlers towing demersal trawls spread with a pair of pelagic doors flown off the seabed. This DS-70-W sensor is there to provide rapid, accurate information, allow- ing the skipper to be sure of the clearance between the door shoes and the seabed and to maintain
a steady distance.

This sounder is multi-function, single-frequency that includes depth, height and temperature indi- cators as standard. In addition to its prime function of checking the seabed distance, it functions as a down sounder to show fishing passing underneath towards the trawl, complementing codend sensors and codend sounders. This makes it possible to estimate volumes of fish as they appear at the front of the gear. It has a full echogram presentation in addition to simple digital clearance readout, with all functions accessible simultaneously.

Offered in high resolution narrow band with rapid updates, it has a battery life that typically reaches 60 hours with the standard 8-12 hour charge, while a 3.5 fast charge option is also available and low pow- er settings can be selected to prolong battery life.

M3 Receiver System

Marport M3 is designed as a highly sophisticated multi-function acoustic receiver. It uses leading edge digital signal processing that we have combined with the smartest software available to make possible multi-channel operation without any compromise between transmission range and signal detection.

The M3 was conceived to meet the needs of smaller vessels, accommodating a series of full-function chan- nels to allow simultaneous use of standard sensors, net sounders – including narrow band – and high resolution net sounders, all of which can be configured to suit the most advanced net monitoring system.

M3 Receiver System

The M4 is our heavyweight acoustic receiver, combining the latest digital signal processing with the smartest soft- ware. This means that true multi-function channel oper- ation is available and there is no compromise between transmission range and signal detection.

We have designed the M4’s multi-functional capacity to accommodate a series of full-function channels allowing simultaneous use of standard sensors, net sounders – including narrow band – and high resolution net sounders, all of these available over an extended frequency range and with selectable configurations for ultramodern net monitoring systems.

The M4 incorporates a host of features that are ready to be implemented, including sensor cross-referencing for positioning and distance, and sensor remote control. The M4 receiver is built to be configured and upgraded using standard software tools and operated with Windows® XP /Vista /7 Professional, Firefox® Web Browser and JavaTM Runtime Environment (JRE).

Hydrophone

Marport’s NHT Hydrophones are the crucial conduits that detect the signals from gear-mounted sensors. For full cov- erage under all conditions, we recommend that port and starboard hydrophones are used to ensure uninterrupted reception. We offer both towed paravane hydrophone and hull-mounted versions for trawl and seine use.

Our hydrophones are designed with dimensions to make them direct replacements for standard industry units, and we offer a comprehensive range of hydrophone types and configurations with passive and active options to meet vir- tually any requirement the fishing industry can throw at us.

ParameterDescription
Uplink Frequency30-60 kHz
Uplink Beamwidth type70° (-3dB)
Diameter1.5m
Range to Vessel2500 m
Working depth1600 m
Pitch & Roll (Angle)±90°
Optional Pitch & Roll Resolution0.1 m
Sounder range (programmable)/td>5 –160 m
Battery TypeLithium-Ion
Warranty2 years (Sensor & Battery)

M3 Config_Attachment #8