Petite ponar dredge Easily carried by one person in one hand. , Vernon Hills, IL) (Olivier and Schneiderman, 1956; WHO, 1957; Hairston et al. 2 liter sample volume), is a versatile grab suitable for quantitative sampling on different substrata (Elliott and Drake 1981). 2L. The dredge was used several times at each site to obtain adequate . Constructed from stainless steel, this bethic sampler gives a whole new meaning to the word “petite. Widely used in fresh and salt water for taking samples of hard bottoms such as sand, gravel, consolidated marl or clay. Washington Department of Fish and Wildlife (WDFW) Aquatic Invasive Species (AIS) Unit staff share the sampling methods they use to monitor for zebra and quag Summary of Contents for WILDCO Petite Ponar 1728-G30 Page 1 Scoop volume is 8200 mL. Ekman 196-B12 Tall Ekman 196-F62 Large Ekman 197-C12 Petite Ponar 1728-G30 Std. Hanna Nov 14, 2022 · Bed sediments were collected during summer 2021 at 8 sites on Eighteenmile Creek and at 6 sites on Oak Orchard Creek using a petite Ponar dredge for macroinvertebrate identification and sediment toxicity testing. p~astic . 1466 latitude -82. e. 3 Trowel Subsampling Stainless steel, plastic or Teflon-lined trowel Measuring tape/ruler . Dec 16, 2013 · Petite ponar dredge. Set the Pinch-Pin (tripping mechanism) on the dredge. This dredge shares the same basic design as our standard Ponar® sampler with stainless-steel construction. ” We mean it can be easily carried by one person in one hand. Quantitative samples were collected at all sites, and either outfitted or washed in the field with a 254-μm mesh net or sieve. Wildco Petite Ponar Sampler Bottom Grab Ponar Type sample when doing trace metal studies. On one Use of a Petite Ponar dredge for lake sediment sample collection. First produced in 1966, it has remained one of the Wash Bucket - 190-E20 mainstays in environmental science. Self-releasing pinch-pin. Dipterans made up about 58% of the sample. Sampling the meiobenthos is clearly dependent upon the environment and whether quantitative or qualititative samples are required. AMS AMS Ekman Dredge. , lakes, rivers, estuaries, and marine waters). These samplers are effective in most types of surface sediments and in a variety of environments (e. • Lighter by half than standard Ponar® Grab • Designed for hand line operation • Removable top screens • Self-releasing pinch-pin™, heavy duty hinges • Extra weights available for more penetration • Center pivot for low bottom disturbance This scaled-down sampler gives a whole new meaning to the word “petite. Measures 6˝W x 6˝L in size and weighs 24 lbs. ”, At just 6. − Petite Ponar® dredge/Van Veen® dredge (0. 8), OD (9. ; Genesee River Plume in Lake Ontario; Army Corp of Engineers Dredge Disposal Site in Lake Ontario; and in Lake Ontario adjacent but north of RG&E' s power generating facility at Russell Station) in the Rochester Embayment on 11 August 2000. Also available with carrying case ( 3-1728-G32 ). Constructed from stainless steel; Designed for hand line operation; Removable top screens; Self-releasing pinch-pin™, heavy duty hinges The organisms were collected with a Petite Ponar dredge, a corer and a hand net. Samples were collected in each of the major tributaries to Estero Bay including the Imperial River, Spring Creek, Estero River, Figure 10 — Petite Ponar dredge for lake sediment sample collection (DSW-CDO). If the Ponar grab sampler descends too quickly, it Mar 11, 2025 · Wildco Petite Ponar 6" Dredge Sampler Model 1728-G30 is designed for retrieving fresh water lake, river, stream or quarry bottom samples. Sediments in the hopper basin were collected using a push core Mar 31, 2012 · This grab weighs about 90 lbs and has the same leveraged bars for lifting as the ponar. Available with or without case. You • Lighter by half than standard Ponar® Grab • Designed for hand line operation • Removable top screens • Self-releasing pinch-pin™, heavy duty hinges • Extra weights available for more penetration • Center pivot for low bottom disturbance This scaled-down sampler gives a whole new meaning to the word “petite. 2 Lower the Ponar to the sediment surface. Sublittoral samples were collected using a Wildco® petite ponar dredge (152mm X 152mm sample area) from depths ranging 1-4 meters. Ensure that all connections are very tight to prevent loss of the sampler. Lower the dredge through the water column. The standard model requires the use of a crane. were collected using a petite Ponar dredge when freshwater flows had been established for several months and invertebrate communities were expected to have colonized the sediments of freshwater portions of each tributary. Sontek M-9 HydroSurveyor Acoustic Doppler Current Profiler Jan 3, 2005 · In each enclosure, nine randomly selected sediment samples were collected by using a Petite Ponar Dredge, after which 50 water hyacinth rosettes were added to the experimental enclosure within each pair. Either the Ponar® or Petite Ponar® grabs may be used with the Wildco® Wash Frame 188-E50. Johns River drainage, 2004-07. The jaws scoop up the benthi • Ekman or Ponar dredge - used for collecting sediment samples from lakes and ponds. Sample volume 2400mL. Jan 20, 2025 · Find many great new & used options and get the best deals for Wildco 1728-G42 6" Petite Ponar SS 316 Dredge Sampler at the best online prices at eBay! Free shipping for many products! This sturdy dredge is available in two sizes: Petite Ponar for shallow samples and easy handling; Standard Ponar for bigger jobs that require extra weight; Petite Ponar Sampler . 024-m 2 area of substrate within each 0. Be sure you are able to keep the boat in proper bal-ance at all times. The unrestored control site samples Jan 13, 2015 · For general sampling: 1200, 1204, 1220, 1230 – E32 kits: These range from 0. 025 square meter [m2]) • Sampling Equipment List − Site Sampling and Analysis Plan and/or site files detailing sampling locations, sample collection, and site information − Large stainless steel bowl − Stainless steel mixing spoon − Latex gloves − Metal or wooden rod 4. Detailed Description. Sediments are ex-amined using sight, touch, and smell. 1. Either the Ponar ® or Petite Ponar ® grabs may be used with the Wildco ® Wash Frame 188-E50 Rinse with clean water. 3). In shallow, quiescent water, the 1728-G30/ 1728-G40 Petite Ponar® Grab Safety: 1. . A total of 6 replicate samples were taken, with three each representing a north and south portion of the transect. The petite model can be carried and operated by a single person without any additional equipment. 1200-C12 kits: 1. ). Sediment retrievals from each dredge deployment were deposited into a single clean stainless steel pan until a sufficient sample quantity was attained for each Translations in context of "Ponar" in Spanish-English from Reverso Context: Los organismos fueron recolectados con una draga Petite Ponar, un nucleador y una red de arrastre. Record an "S" in the comment code position of the sample number. Table 4. 10. Be careful not to place fingers or hands on or into any pinch points. Freshwater "Seeded" Stream Condition Index (SCI) Samples Using a bowline knot, attach the necessary length of rope to the Wildco Petite Ponar dredge. %PDF-1. 5. An abundance of roots and rhizomes restricted the use of the Ponar dredge to the few open areas in the marsh. Set the Pinch-Pin (tripping mechanism) on […] Jan 31, 2005 · This left 36 potential 0. 25-m 2 sampling points, nine of which were randomly selected for baseline sampling by using a Petite Ponar Dredge (Cole-Parmer Instrument Co. Field Equipment & Accessories. successive grabs are pulled from various spots around the perimeter of the boat within the 25 m2 station. The grab sampler should be lowered slowly to within 5 m of the bottom, then allowed to free fall to the bottom. Appendix 2: Fishes species recorded from selected springs sampled in the St. tray. A stainless steel petite ponar dredge was used to collect sediment samples from the upper six inches of aquatic substrate. Hand spool. Jan 13, 2015 · 1. Appendix 1: Macroinvertebrate taxa collected by dip net and petite ponar dredge from selected springs in the St. Using a bowline knot, attach the necessary length of rope to the Wildco Petite Ponar dredge. Field Survey Equipment. Distribución de especies invasoras: casos de estudio. Heavy duty hinges. Each grab is collected from previously undisturbed substrate, i. g. Original Thumbnail Medium. The Ponar Samplers, or "˜Grab Samplers', are widely used in fresh and saltwater for taking sediment samples from hard bottoms such as sand, gravel, consolidated marl, or clay. Standard and Petite Ponar Dredges Eckman Dredge Hand-held Core Samplers. Cumulative taxonomic list of benthic macroinvertebrates collected by dip net and petite ponar dredge from Apopka, Bugg, Rock, and Wekiva springs, December 2005-September 2006. Another easy to handle grab that can be used in deeper water off of a small boat with no winch. 05 m 2 sampler with an estimated penetration of 5 cm depending on the type of (Ekman dredge, petite ponar, sediment corer, hand, etc. Bottom sediment samples were collected using a Petite Ponar grab sampler at locations within the dredge area. 25-m 2 sampling point Download manuals and software for Wildco models Hand Corer, Kemmerer Sampler, Petite Ponar Sampler, Standard Ponar Sampler, and Standard Ponar Sampler. Phytoplankton dynamics at Swanton Reservoir during 2017. Whether you're conducting routine sediment analysis or working on a specialized project, our dredges provide the reliability and accuracy required for successful results. The Pinch-Pin must be inserted with the flat portion facing up and down. Use with 5/8˝ or We mean it can be easily carried by one person in one hand. Petite Ponar Grab Surficial sediments (0-2 cm from the sediment-water interface) were carefully scraped from the sample while sediments were contained in the dredge using a plastic spatula and retained for analysis. Collecting and storing For use in Fisheries Tech and Science Ohio River and tributary sediments were collected using the ORSANCO Standard Operating Procedure for Collection of Bottom Sediments. 8kg, the locations during 2011 and 2012 through several macroinvertebrate methods: corer, Petite Ponar dredge and a pushnet, physicochemical variables were also recorded in water and sediment. The Petite Ponar Grab is much lighter than the Standard Ponar and designed for hand-line operation. At least 13 species of aquatic invertebrates, representing 13 familiesand 10 orders were collected from restored canal habitats in King’s Bay. petite ponar dredge at evenly spaced locations throughout the lake, indicated a fairly healthy benthic macroinvertebrate community. From 44 sites sur-veyed (4 estuarine, 17 lakes and 23 riberine), the Jun 1, 2000 · To sample the mollusks available to foraging scaup, we collected three replicate dredge samples near six randomly selected scaup collection sites using a 15-cm 2 petite Ponar dredge (Abadie and This dredge shares the same basic design as our standard Ponar® sampler with stainless-steel construction and cast scoops. Macroinvertebrate sampling included a petite ponar dredge for the benthos as well as dipnet smapling. In the columns, record the sample, color of sediment, estimated grain size, the composition and other comments. You may still need good muscle mass, but, since it weighs under 25 pounds, you Of the grab samplers, the Van Veen, Ponar (see photograph on page 3-6), and Petersen are the most commonly used. It has good closing force and works good for sampling in areas with sedimentation present. 8 Figure 11 — Phytoplankton dynamics at Lake Hope during 1975 and 2016 petite Ponar dredge, hand dip net, and artificial substrates. 4. Freshwater "Seeded" Stream Condition Index (SCI) Samples Jan 13, 2015 · 1. Use with 5/8˝ or larger line. The PONAR Dredge Grab Underwater CameraBL5421 Lake Superior Explorations for Graduate Students Summer 2015Video by Colin BrooksThe PONAR dredge - our target here Table 3. A visual estimate of ponar fullness is recorded to quantify the effectiveness of the ponar grab sample. 9 °C), Conductivity (664 mS cm-1) and organic matter Zooplankton sampling consisted of replicate vertical tows with a plankton net. 023 m2). Preliminary Techniques: 1. Results. For sampling through shallow water, up to 12 feet deep, we also have sludge samplers available. Petite Ponar Sampler 6x6 sku 90215: Constructed from stainless steel, this bethic sampler gives a whole new meaning to the word “petite. Features & Benefits. This sturdy dredge is available in two sizes - Petite Ponar for shallow samples and easy handling, or the Standard Ponar for bigger jobs that require extra weight. 6 %âãÏÓ 89 0 obj >stream hÞDÌÑjÂ0 ÆñW9w&0í9i eˆP-ìFAØÀ aD“Ö`I$9eì¥|Æ 6 ßíÿ÷i „õºhF¾Å$Z· ]¾ ¿@sñ½ñƒ,vÉ ö1´† h_ ’Æ 1728-G30/ 1728-G40 Petite Ponar Benthic Dredges Bottom Ponar Eckman Samplers. 1). For qualititative sampling within the littoral zone, for both coarse and fine sediment, a bucket and spade will work. The dredge removed a 0. Samples were collected from a boat using a Petite Ponar®clamshell-style dredge. • Macrophytes were agitated by hand in water for 30 sec to remove any attached snails, which were allowed to sink to the bottom, separating them from the vegetation (Fig. The Standard Ponar Grab requires a Winch (66-C10), winch mount (66-C52) and stainless steel cable (61-B14) for proper operation. Fullness estimates less than 25% of ponar capacity will be discarded as ineffective sample attempts. The 6 samples were compiled into and washed through an 800 µm net. Mar 20, 2017 · nets and visual transects were used to assess fishes while a petite Ponar dredge, Hester-Dendy substrates and dip net were used to sample macroinvertebrates. ” Petite Ponar® Grab 1728-G30 Petite, SS Scoops only 1728-G40 Petite, All Stainless Steel. Freshwater Petite PONAR Dredge Samples Samples were collected on Sunday, May 27, 2012 on the southwest shore of Lake Santa Fe in Melrose, FL. Petite Ponar Grab, SS - Includes carry case, All 316 SS, 28lbs [1728-G42] • Lighter by half than standard Ponar® Grab • Designed for hand line operation • Removable top screens • Self-releasing pinch-pin™, heavy duty hinges • Extra weights available for more penetration from 0. 25 liters sample volume) and petite size (2. What is a ponar grab? Traducciones en contexto de "PONAR" en español-inglés de Reverso Context: Los organismos fueron recolectados con una draga Petite Ponar, un nucleador y una red de arrastre. each 1728-L12 Pinch-pin™ with chain and safety pin over a tub placed to receive the sample. 4 – 3. sample~volumes. 66-C10 General Purpose Winch. Ponar grabs and Van Veen grabs can be Teflon coated, please call for details. During one of the frequent selections, Aronowicz and her two children were selected for a transport to Ponar. Center pivot for low bottom disturbance. Describe the sediments' appearance, feel, and odor In contrast, the Ekman dredge is better for collecting firmer, denser, and more compact sediment samples, resulting in less disruption and preserving sample integrity. Trip the dredge by allowing the line to become slack. 2 Petite Ponar® Sampling Petite Ponar® sampler Sample messenger Cable Stainless steel or Teflon-lined pan (tray) 4. Hanna Direct Soil EC Tester - HI98331. 6 mg/l), temperature (33. You Petite Ponar® Grab: 1728-G30 Petite, SS Scoops only 1728-G40 Petite, All Stainless Steel Replacement Parts and Accessories: 1728-G36 Replacement screen, slide type, Pair 1726-G12 Weights, galvanized, pack 4, 2 lbs. Number of specimens (n) and percent composition (%) of benthic macroinvertebrate taxa collected by dip net from Bugg Spring, December 2005-September 2006. 9-3. Petite Ponar dredge, Hester-Dendy (HD) substrates and qualitative dip net sampling of macroinvertebrate communities were conducted along with fish trapping and visual surveys. Petite Ponar Grab/Ponar Dredge • Lighter by half than standard Ponar® • Designed for hand line operation • Removable top screens • Self-releasing pinch-pin™, heavy duty hinges • Extra weights available for more penetration • Center pivot for low bottom disturbance This scaled-down sampler gives a The Stainless Steel Ponar Grab Sediment Dredge is a self-closing sampler using a patented spring-loaded Pinch-Pin™ system that releases when the sampler impacts the bottom and the lowering cable or line becomes slack. , 1958; Fig. Sediment samples were sieved in the field to remove particles larger than 2mm. As the name suggests it is small, but it does have much more closing force than an Ekman by utilizing lifting bars that close the jaws. SAMPLER COMPARISON Catalog number Std. 910-G26 Plastic case Our Ponar sampler rentals are available in two sizes. 6 times more efficient than the petite Ponar in the collection of oligochaetes and chironomids. collected with a Petite Ponar dredge, a corer and a hand net. Have A Question? Jan 13, 2015 · 1. Ponar 1725-F10 Box Size 15 x 15 x 15 cm (6 x 6 x 6 in) 15 x 15 x 23 cm (6 x 6 x 9 in) 32 x 32 x 32 cm Standard Ekman Tall Ekman Grab Large Ekman Petite Ponar® Ponar® Grab Catalog Number Box Size (footprint) Bite depth Screen mesh Dry Weight Weight with sample Extra weights Ship weight Volume of Scoops Sample area Length and width overall Accessories needed Ekman, Standard 196-B12 Kit 15 x 15 x 15 cm [6 x 6 x 6"] 152 mm [6"] none 3 kg [7 lbs The Ponar Samplers, or ‘Grab Samplers’, are used in fresh and salt water for taking shallow sediment samples from hard bottoms such as sand, gravel, consolidated marl or clay. Since it weighs under 25 pounds, you can use it on a line without the winch and crane recommended for the larger version. The sediment in the overflow was sampled using an extension-arm bottle sampler at the overflow weir. Lake Rupert, 2016 Inland Lake Water Quality Report Lake Rupert 2018 Division of Surface Water Inland Lakes Program 2020 Mar 1, 2005 · In each enclosure, nine randomly selected sediment samples were collected by using a Petite Ponar Dredge, after which 50 water hyacinth rosettes were added to the experimental enclosure within Ponar 'Grab' Sampler (Petite and Standard) Wildco Kemmerer Sampler, 6. The majority of macrophytes were then removed by hand and vegetation volume was estimated using a a Petite Ponar Dredge at four sites (Genesee River at Portland Cement, Inc. 2 L and are constructed of 316 SS with polyurethane seals. Rinse with clean water. You Nov 1, 2018 · Data from 24 grab samples, eight each taken with the Standard Ponar, Petite Ponar, and Shipek grabs from a backwater habitat were statistically compared using one-way analysis of variance. Samples were emptied from the dredge into a clean . Removable top screens. 3. 4 Work Platform and Water Safety Approved personal flotation device Rowboat with oars Shop thousands of sampling items, nets, bottles, corers, grabs, test meters and more. 7 Figure 7. Removable window Petite Ponar 500µm. In the sedimentary environment the methodology used also depends on the physical morphology of the sediment. Wildco Petite Ponar Stainless Steel Grab, 6˝W x 6˝L . Wildco AMS Ekman Dredge. If you need manuals, software, or assistance with equipment rented or purchased from Equipco and have not found what you need, please call 1-888-234-5678. Severe injury to fingers or hands can be caused by movement of the lever arms. Uses 3/16”+ line. Ponar deployment SOP. Uses 3/16”+ line or 61-B14 cable, sold separately. The Van Veen is popular for contaminant programs because you can get plenty of volume for sediment analytical characterizations. Total Iron In-Lake Sediment Ponar Dredge None 250 Percent Solids In-Lake Sediment Ponar Dredge None 250 Merit Laboratories was used for analysis of water quality and sediment chemistry parameters for all sample events with the exception of the 10 May event, which was analyzed by Pace Analytical Laboratories. each 1728-L12 Pinch-pin™ with chain and safety pin. Physicochemical water parameters regis-tered maximum values of pH (8. Enjoy FREE SHIPPING on orders of $100 or more! (Certain restrictions apply) • Lighter by half than standard Ponar® Grab • Designed for hand line operation • Removable top screens • Self-releasing pinch-pin™, heavy duty hinges • Extra weights available for more penetration • Center pivot for low bottom disturbance This scaled-down sampler gives a whole new meaning to the word “petite. • Nylon rope or steel cable - for raising and lowering the dredge • Collection containers - 8-oz and one-quart wide mouth glass jars with Teflon lined lids. Where available, qualitative samples were collected in bank or over-hanging vegetation, woody debris dams, Lake Alma — Inland Lake Water Quality Report September 2020 2 Physical Attributes The L1 sampling location is centered at GPS location 39. Each grab was put into a Wildco sieve bucket with #30 mesh to separate samples from substrate. Additionally, the molluskan fauna was sampled through visual observations with the use of a shell bar, and with the petit ponar dredge. En una de las selecciones frecuentes, Aronowicz y sus dos hijos fueron enviados a Ponar. The majority of benthic samples in water depths >1 m are collected via petite ponar dredge (sample area = 0. This sturdy dredge is available in two sizes - Petite Ponar for shallow samples and easy handling, or the Standard Ponar for bigger jobs that require extra weight. Taking care to stay clear of the edges of the grab jaws, open the sampler and discharge the sample Jun 24, 2015 · Petite Ponar Sampler and Sample By Columbia Environmental Research Center June 24, 2015. Replacement Parts and Accessories 1728-G36 Replacement screen, slide type, Pair 1726-G12 Weights, galvanized, pack 4, 2 lbs. For drum sampling and confined areas: 1204-E32, 1204-E42 kit: Small, compact bottles only 7. For each grab, record the water depth, volume of material in the dredge, and bottom substrate condition. to poor sediment retrieval with the gravity core sampler, a winch-mounted Petite Ponar (Peterson) sampling dredge (volume 2. Jan 15, 2024 · The Ponar grab, which is available in a standard (7. Most Ponar grabs have a mesh screen and rubber flap as a removable lid which allows subsampling. 5166 longitude (Figure 2). This dredge shares the same basic design as our standard Ponar® sampler with stainless-steel construction and cast scoops. Designed for hand line operation. Sediment retrievals from each dredge deployment were deposited into a single clean stainless steel pan until a sufficient sample quantity was attained for each Petite Ponar), and retrieve the dredge. May be Ponar 'Grab' Sampler (Petite and Standard) AMS Ekman Dredge. Weighs under 25 pounds so you 362. Other examples in context the dredge container, and from the dredge overflow were collected. Download. 2. Removable window Standard Ponar 500µm. Uses 3/16”+ line or 61-B14 cable. collected with a petite Ponar dredge (0. Lifting the Ponar® Grab into the boat, dumping its contents, and washing those con-tents may require leaning over the side of the boat. Lighter by half than standard Ponar Grab. • Gloves - for personal protection and to prevent cross-contamination of samples. This scaled-down sampler gives a whole new meaning to the word “petite. 4 L) was subsequently employed to obtain sediment samples. You May 29, 2006 · Fifty-seven sediment samples were collected from studied locations using a Petite Ponar Grab or a Ponar Grab 0. This sturdy dredge is available in two sizes - Petite Ponar for shallow samples and easy handling, or the Standard Ponar for bigger jobs that r The Petite Ponar ® sample is designed for use with the Wildco ® 190-E25 wash bucket. Hanna Hanna Direct Soil EC Tester - HI98331. Fifteen different invertebrate species were collected, including two mollusks, one segmented worm, one amphipod crustacean, one mayfly, and ten dipteran (fly) larvae. It appears from the results of Sly's investigations that the reliability of the trigger system and the design, shape, and cut of the jaws are probably the two most important a Petite Ponar Dredge at four sites (Genesee River at Portland Cement, Inc. River. In the sub-littoral and deep water Jan 1, 2014 · These are the Franklin-Anderson grab, the Dietz-LaFond sampler, the Birge-Ekman dredge, the Foerst Petersen grab sampler, the Ponar grab, and the Shipek bottom sampler. It is advisable to take one or two trial samples at the beginning of a sampling program as a means Petite Ponar. . Detritus and pebbles were removed and excess water was poured off. Jan 1, 2014 · Freshwater Petite PONAR Dredge Samples ♦ The One-Way AN OV A an d the Mann-Whitney analyses showed firmness was signif icantly higher for formalin preserved samples compared to ethanol pre Dec 12, 2023 · Sites were sampled in triplicate using a Petite Ponar dredge (Wildco #1728-G30) to sample an area of 152 mm x 152 mm per grab then hoisted to the boat using an electric crab pot puller. 2); at deeper locations a petite ponar dredge was used. 4” (187 […] Nov 10, 2011 · Schloesser and Nalepa (Citation 2002) showed a large Ekman and petite Ponar to have similar efficiencies in the collection of mayfly nymphs in soft substrate, which contrasts with the results of our study in which the large Ekman was 1. This report may serve as a baseline assessment for unrestored canal habitat, as well as time-zero 1728-G30/ 1728-G40 Petite Ponar® Grab Safety: 1. May 20, 2019 · The PONAR grab is a metal device that is deployed to the lake bottom and triggered to clamp shut when it reaches the lake floor. Artificial substrates consisted of wire sterilizing baskets filled with vegetation, and they were used in both floating and submerged positions. 2 L and is constructed of transparent acrylic with polyurethane end seals. 0m (Fig. The Petite Ponar ® sample is designed for use with the Wildco 190-E25 wash bucket. The jaws will close automatically as the grab sampler is raised from the sediment surface. This unit is great for rivers and shallow waters. each 1726-G52 Weights, stainless steel, pack 4, 2 lbs. Attach one end of the cable to your winch and the other to the dredge. nfwdr djsg tivw pvvi kpxqo whox gyuncg vfz aequi lxkavdh aqmigdxb josnmsf ubutal msem haf