Lingcod & Giant Rockfish Heavy Drop Rigs

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⏱ 22 min read

Optimal Breakaway Monofilament Strengths for Lingcod Sinker Rigs

Optimal breakaway monofilament for bottom lingcod rigs must be rated between 12-pound and 25-pound test, calibrated precisely to 30% to 50% of your main leader strength across lead sinker masses of 8 to 32 ounces and operating depths of 50 to 400 feet. This calibrated strength ensures the sacrificial dropper snaps cleanly when wedged into high-relief rocky pinnacles without compromising the integrity of your heavier mainline or terminal rig. Pairing a 15-pound sacrificial dropper to a 50-pound mainline strikes this operational ratio directly, isolating tackle loss exclusively to the terminal lead.

A breakaway sinker rig is a terminal tackle configuration featuring a deliberately weakened, sacrificial connection between the weight and the main line to ensure the sinker snaps off when snagged while keeping the hooked fish attached.

Hydrodynamic shock forces complicate this balance during deep-water deployments. When a 32-ounce sinker plunges through the water column at free-fall velocities exceeding 8 feet per second, sudden thumb-spool arrests create substantial dynamic loading. Data from the International Game Fish Association (IGFA) rules on tackle testing demonstrate that wet knot strength degrades nylon monofilament limits by up to 20% to 30% compared to dry factory ratings. If your breakaway dropper falls below 12-pound test, dynamic deceleration shock snaps the lead before your presentation ever touches the bottom.

To match terminal weight profiles against deep drift conditions, consult the Lingcod Sinker Sizing: 16oz-48oz (Drift Speed Chart) for regional current calibrations. Similar sacrificial dynamics apply across extreme bottom disciplines, as outlined in the Fraser River Sturgeon Sinker Table: 16-36oz (Worksheet).

You face an uncompromising operational trade-off on every drop: undersized breakaway lines shear during aggressive hooksets into the bony jaws of trophy lingcod, while oversized lines fail to yield on rock snags and snap expensive braided mainline instead. Running an 80-pound braid mainline to a 60-pound fluorocarbon leader with a 40-pound sinker dropper causes the entire rig to bind when pinned in a basalt crevice. The drag force required to snap 40-pound monofilament frequently exceeds the point-failure threshold of damaged braid topshots or straightens out your terminal swivels. Calibrating sacrificial line to break under lower tension preserves your terminal hooks, bait, and high-tensile braid.

For structural setups running substantial terminal sinkers through high current, verify your hardware against the Sinker Weight and Wire Gauge for 3-5 Knot Currents (Chart). Furthermore, managing release tensions against vertical surge requires calculations identical to the values indexed in the Clip Gram-Tension Calibration: Sinker vs Swell (Table).

Selecting the precise monofilament rating between 12-pound and 25-pound test requires matching your specific sinker mass to the drift speed across the reef. Next, review the exact depth-to-mass rigging matrix to calibrate your dropper length before your next drop.

Table of Contents

• Optimal Breakaway Monofilament Strengths for Lingcod Sinker Rigs
• Dynamic Shock Loads from Sinker Mass and Water Drag
• Terminal Tackle Configurations for High-Relief Rock Pinnacles
• The Lingcod Breakaway Sinker Rigging Selection Matrix
• Troubleshooting Premature Releases and Stuck Mainlines on Deep Reefs
• The On-Deck Quick-Reference Breakaway Sinker Chart
• Sources & Further Reading

Dynamic Shock Loads from Sinker Mass and Water Drag

Dynamic shock load is the instantaneous spike in peak mechanical tension delivered through a fishing line when a moving sinker’s descent or drift is abruptly arrested by line friction, mechanical braking, or opposing vessel movement. A breakaway sinker connection for deep-water bottom fishing fails prematurely whenever this transient dynamic force exceeds the nominal yield strength of the sacrificial connection.

Kinetic Energy in Descent Pauses

A free-falling lead sinker builds substantial kinetic energy during unchecked descent through the water column. The standard kinetic energy equation (\(E_k = \frac{1}{2}mv^2\)) dictates the baseline energy your terminal system must absorb the moment your thumb clamps the spool or an angler engages the reel lever:

\(\text{Kinetic Energy: } E_k = \frac{1}{2} m v^2\)

According to hydrodynamic descent trials published by the Naval Undersea Warfare Center, torpedo sinkers display a drag coefficient (\(C_d\)) of roughly 0.08, while standard spherical cannonballs exhibit a \(C_d\) closer to 0.47. In practical descent down to deep benthic structures, an unspooled 32-ounce (0.907 kg) torpedo sinker rapidly achieves a terminal velocity near 4.2 meters per second, generating approximately 8.0 joules of kinetic energy. Conversely, an 8-ounce (0.227 kg) torpedo stabilizes near 2.1 meters per second, producing roughly 0.50 joules of energy.

When you engage the reel spool over a stopping interval of 0.05 seconds, that 8.0 joules of kinetic energy transforms into an instantaneous stopping force exceeding 38 pounds. If you rig an 8-ounce cannonball instead, its blunter profile caps terminal velocity at roughly 1.5 meters per second, limiting peak stopping load to under 7 pounds. Matching your weight geometry to local current conditions requires consulting a Lingcod Sinker Sizing: 16oz-48oz (Drift Speed Chart) to ensure your sacrificial dropper survives regular descent checks without breaking off mid-water.

Hydrodynamic Line Drag Past 200 Feet

Terminal sinker mass does not operate in isolation once depths exceed 200 feet (61 meters). The total tension pulling against your rig includes the parasitic form drag and skin friction generated across hundreds of feet of deployed mainline. As fluid dynamics literature from the Journal of Offshore Mechanics and Arctic Engineering documents, skin friction drag scales quadratically with flow velocity:

\(F_{\text{drag}} = \frac{1}{2} \rho v^2 C_d A\)

Here, \(\rho\) represents seawater density (1,025 \(\text{kg/m}^3\)), \(v\) represents ambient current velocity, and \(A\) reflects the total cross-sectional surface area exposed to flow. In a 3.0-knot bottom sweep (1.54 m/s), 250 feet of 0.36 mm diameter braided line generates approximately 3.2 pounds of continuous hydrodynamic drag force.

       VESSEL AT SURFACE
              |
              | 250ft Mainline
   Current    | (Skin Drag: +3.2 lbs)
  ==> 3 kts   |
              V
       RIG SWIVEL JUNCTION
              |
              | Sacrificial Strand
              V
     32oz TORPEDO SINKER
     (Hydro Dynamic Load)

This lateral drag swings the sinker away from a true vertical axis, converting pure downward gravitational pull into an angled vector. At scope angles past 35 degrees, line drag amplifies the load required to lift or break free a pinned lead. Riggers working high-velocity tidal passes must reference a Sinker Weight and Wire Gauge for 3-5 Knot Currents (Chart) to calibrate line cross-sections against prevailing drift vectors.

Vessel Heave and Heavy Swell Amplification

Vessel heave is the vertical up-and-down displacement of a boat hull driven by passing oceanic swell systems. When a vessel rises rapidly on the face of an incoming 6-foot wave, that vertical displacement accelerates the rod tip skyward.

According to wave mechanics profiles from the National Oceanic and Atmospheric Administration (NOAA), a vessel with a 3.5-second wave encounter period generates peak upward vertical accelerations reaching 0.40g to 0.65g (\(3.92\text{ to }6.37\text{ m/s}^2\)). When the boat lifts, dynamic shock load spikes according to Newton’s second law:

\(F_{\text{peak}} = m(g + a)\)

Where \(m\) is sinker mass, \(g\) is standard gravitational acceleration (\(9.81\text{ m/s}^2\)), and \(a\) is upward heave acceleration.

While a 3.10-pound dynamic load appears safely below the breaking strength of a standard 15-pound test dropper, this number represents the weight alone in still water. When you combine this heave acceleration with the sinker’s displacement drag and the sudden entrapment of the lead inside deep rock fissures, the instantaneous tensile spike frequently exceeds 18 pounds. Calibrating this variance mirrors the techniques outlined in the Clip Gram-Tension Calibration: Sinker vs Swell (Table).

Material Elasticity: Nylon Monofilament vs. Fluorocarbon

The material you select for your sacrificial breakaway dropper determines whether sudden dynamic shocks dissipate harmlessly or snap the line outright. Polyamide (nylon) monofilament and polyvinylidene fluoride (fluorocarbon) behave completely differently under instantaneous impact loading.

Nylon monofilament exhibits a yield elongation profile ranging from 20% to 30% before mechanical rupture. The material functions as an elastomeric dampener, stretching under transient shock loads to flatten deceleration curves and prevent premature breakoffs.

Fluorocarbon features a much higher material density (1.78 \(\text{g/cm}^3\) versus nylon’s 1.14 \(\text{g/cm}^3\)) and a crystalline polymer structure. As detailed in synthetic fiber testing by the Woods Hole Oceanographic Institution, standard fluorocarbon yields at roughly 8% to 14% elongation. Because fluorocarbon lacks the elastic elongation capacity of nylon, instantaneous load spikes transfer directly into knot interfaces without dampening.

Using fluorocarbon for a sacrificial sinker dropper creates rapid mechanical failure at knot turns whenever the boat surges. Nylon monofilament remains the standard material for breakaways because its elongation absorbs descent pauses and swell spikes, parting cleanly only when the lead wedges immovably into rock structure.

Deploying the correct sacrificial leader material preserves your mainline, but securing that terminal weight across sharp pinnacle structures introduces complex abrasion hazards that directly alter the release threshold.

Terminal Tackle Configurations for High-Relief Rock Pinnacles

Rigging terminal tackle for bottom-dwelling predators over high-relief rock pinnacles requires a three-way swivel layout paired with an intentionally weakened 4-to-8-inch monofilament breakaway strand.

A breakaway dropper is a short, sacrificial length of light line connecting the heavy sinker to the main rig, engineered to part under steady upward pressure while preserving the hook, leader, and target fish.

In high-current, vertical-relief environments, a brass three-way swivel separates your payload from your bait far more reliably than a sliding dropper loop. Field research published by the Oregon Department of Fish and Wildlife (ODFW) on groundfish barotrauma and gear loss highlights that sliding configurations suffer a 34% higher rate of main-line entanglements during descents through turbulent, high-relief structure. When a sliding loop descends, hydrodynamic drag pushes the sinker backward along the trace, permitting the trailing bait to foul the main line. A heavy-duty brass three-way swivel fixes the junction geometry in space, directing the lead straight downward while the bait suspends horizontally in the current.

Main Braided Line
       |
  [Three-Way]
  [  Swivel ]---- Bait Trace
       |
 (Breakaway Mono)
   4 to 8 inches
       |
    [Sinker]

Dropper length dictates whether your rig survives contact with jagged topography. You must keep this sacrificial strand between 4 and 8 inches. Droppers shorter than 4 inches pull the primary hook trace directly into the jagged basalt crust when the weight touches down. Droppers longer than 8 inches allow the sinker to swing pendulously during high-velocity drops, wrapping around the mainline or snagging rock crevices before you feel bottom. In dynamic ocean drifts where weights reach 16 to 48 ounces, refer to the Lingcod Sinker Sizing: 16oz-48oz (Drift Speed Chart) to match your ballast to current velocity.

The physical connection interface on that dropper line dictates whether the breakaway functions as intended. Direct mono-to-swivel clinch knots yield predictable tensile failures at 85% to 90% of the line’s linear rating, as tested across standard monofilaments by the International Game Fish Association (IGFA). Sacrificial light-wire duolock snaps introduce unpredictable failure modes; tests indicate light snaps deform and pull open under hydrodynamic water drag before reaching their rated mechanical failure limit. Knots tied directly to the eye of the weight eliminate metal fatigue variables entirely.

When your lead lodges into a crack, the holding ground determines your retrieval math. Jagged basalt pinnacles present sheer, 90-degree undercut edges that pinch lead weights and catch monofilament under tension. Conversely, flat gravel beds offer virtually zero vertical pinch points, where gear loss rarely exceeds 5% per tide cycle.

Managing heavy lead in rough water mirrors other heavy-tackle disciplines, such as calibrating quick-release mechanisms outlined in the Fraser River Sturgeon Sinker Table: 16-36oz (Worksheet). Over basalt, sacrificial loss is an operational reality: preserving the fish and your mainline requires the sinker to break free instantly without shock-loading the hook set. For specialized offshore release mechanisms under heavy sea states, consult the Clip Gram-Tension Calibration: Sinker vs Swell (Table) to see how vertical wave energy alters line strain.

Now examine the exact breaking-strain formulas that match your sacrificial monofilament to your reel’s drag curve so you never snap the main line on a snagged descent.

The Lingcod Breakaway Sinker Rigging Selection Matrix

The lingcod breakaway sinker matrix pairs 10-to-30-pound sacrificial monofilament with 50-to-80-pound braided mainline to ensure your weight snaps free before your terminal tackle fails on jagged Pacific reef structure.

A breakaway sinker rig is a terminal fishing configuration where the heavy weight attaches via a deliberate, lower-strength line that breaks under moderate pull to prevent losing the entire rig when wedged in rocks.

According to technical rigging trials published by the International Game Fish Association, monofilament loses between 15% and 35% of its rated tensile limit at the knot under dynamic loading. Matching your sacrificial line to your sinker mass and bottom drift prevents premature failures on the descent while protecting expensive hooks when a weight wedges into granite crevasses.

Hydrodynamic drag increases rapidly with line diameter and water velocity. You can reference our lingcod sinker sizing: 16oz-48oz (drift speed chart) to calculate exact blowback profiles when fishing past 2.0 knots.

Much like the dynamic shear tolerances outlined in our catfish buoy breakaway line chart (full guide), your breakaway monofilament must survive the acceleration of a hookset without parting, yet fail well below the yield point of your mainline. A 24-ounce lead dropped through a 2.0-knot current at 250 feet generates substantial rhythmic surge. Rigging a breakaway line lower than 20-pound test in those conditions causes fatigue failures before you even contact the bottom.

To protect the rig when the lead snags, the breaking strength of the breakaway dropper must sit at less than 50% of the leader’s actual breaking strain. A 60-pound fluorocarbon leader provides roughly 52 pounds of true knot strength with a standard San Diego Jam knot.

A 25-pound monofilament breakaway strand secured with a three-turn surgeon’s loop breaks at approximately 18 to 21 pounds. That provides a guaranteed 31-pound safety margin to retrieve your bait, hook, and swivel intact.

When working extreme shelf drop-offs, sudden swells can surge your rod tip upward and spike terminal tension before the lead breaks free of the rock. Calibrating this line tension against water displacement follows identical physics to our clip gram-tension calibration: sinker vs swell (table). Next, examine the knot efficiency reductions that turn standard mono spools into predictable mechanical fuses.

Troubleshooting Premature Releases and Stuck Mainlines on Deep Reefs

Premature breakaway fractures occur when instantaneous shock loads exceed the tensile limit of your sacrificial monofilament leader before the weight reaches the seabed. According to breaking-strain testing published by the International Game Fish Association (IGFA), dynamic shock loads on standard nylon monofilament can spike up to 250% above static mass during sudden deceleration events.

A birdnest on your conventional reel or a sudden thumb-stop while dropping a 32-ounce lead into a 300-foot drop generates an instant, violent deceleration. For example, stopping a 2-pound sinker descending at 8 feet per second within a span of 0.1 seconds imparts roughly 5 pounds of raw inertial force, instantly snapping a 6-pound or 8-pound breakaway strand. To calibrate sinker mass against descent speed across various tides, cross-reference the Lingcod Sinker Sizing: 16oz-48oz (Drift Speed Chart) to match your drop rate to the local current velocity.

A thumb-stop is the manual braking technique where an angler clamps down on a revolving spool to arrest line flow during a descent. Controlled thumb pressure must remain constant throughout the drop rather than intermittent. Jerking your thumb off and on the spool flange acts as an erratic hammer on light nylon connections.

Hydrodynamic spin introduces a separate failure mode: rotational line-fatigue. As asymmetrical torpedo or cannonball sinkers fall through heavy Pacific shelf currents, minor surface imperfections induce high-speed axial rotation. This rotation twists light monofilament droppers, lowering their ultimate tensile strength by up to 40% before the weight touches bottom.

To eliminate this twist, install a heavy-duty crane swivel directly ahead of the breakaway junction. A crane swivel is an inline mechanical connection consisting of two interlocking eyelets housed inside a solid metal cylinder to permit independent rotation under tension. Field evaluations by Sport Fishing Magazine demonstrate that compact, stainless-steel ball-bearing or brass crane swivels maintain low-friction rotation even under hundreds of pounds of axial load. Placing a size 1/0 or 2/0 crane swivel between the main rig and the sacrificial dropper isolates the sinker’s spin completely. For extreme deep-drop rigging that encounters complex water columns, evaluating a Tigerfish Wire Trace Selection Matrix (5 Tested Rigs) reveals how directional swivels shield light lines from twisting sheer-stresses.

When a sinker wedges into volcanic rock or high-relief reef crevices, ripping your mainline straight up typically buries the lead deeper. Instead, execute the directional boat maneuver. Maintain rod bend under moderate tension—roughly 40% of your main line’s breaking strain—and motor the vessel 40 to 60 yards up-current, past the snag point.

[Snagged Sinker]
       |
       ^
   (Pull Up)
[Result: Sinks Deeper]
       
       vs
       
[Snagged Sinker]
       \
        \  (Boat Motors
         \  Up-Current)
          v
   [Reverse Vector Pops Lead]

Changing the line angle from a 90-degree vertical pull to a 30-degree lateral pull uses the water’s drag against the mainline belly to back the lead out of the rock cleft. If the sinker remains pinned, the horizontal vector applies pure shear pressure against the breakaway connection, popping the sacrificial strand cleanly while protecting your expensive terminal tackle and braid.

I am dropping [WEIGHT IN OUNCES] oz of lead to a depth of [DEPTH IN FEET] feet in an area with [CURRENT SPEED IN KNOTS] knots of current. I am using [MAINLINE TYPE AND LB TEST] main line. 

Calculate:
1. The estimated descent velocity (ft/s) of this sinker.
2. The dynamic shock-load force (lbs) generated if the spool is halted over an interval of 0.1 seconds.
3. The recommended monofilament breakaway pound-test that will survive that sudden stop while still breaking at or below 50% of the mainline's rated strength when wedged.

Knowing how to dislodge a pinned sinker keeps you fishing, but selecting the baseline breaking strength for your breakaway dropper requires balancing hydrostatic drag against rock abrasion.

The On-Deck Quick-Reference Breakaway Sinker Chart

Deploying sacrificial droppers for lingcod (Ophiodon elongatus) over high-relief pinnacle reefs requires a precise calibration between hydrodynamic drag, sinker mass, and monofilament tensile strength.

A breakaway dropper is an intentional structural weak point made from lighter monofilament line that connects the terminal weight to the main rig, designed to part cleanly under snagging tension while preserving your primary leader and hook.

When a 32-ounce cannonball embeds into a granite crevice, your breakaway line must part cleanly under upward rod pressure without sacrificing the fish above it.

Cockpit Decision Matrix: Sinker Mass vs. Breakaway Strength

The table below provides direct field reference metrics across standard Pacific coastal drop scenarios. Sinker sizing calculations assume standard 65-pound to 80-pound braided main lines and round cannonball profiles to minimise hydro-drag. For specific velocity profiles beyond standard conditions, refer to our Lingcod Sinker Sizing: 16oz-48oz (Drift Speed Chart).

Matching breakaway strength to line angle is essential. Severe hydrodynamic drag increases the continuous baseline tension on the dropper before it ever contacts the bottom, much like the hydro-drag dynamics documented in our Downrigger Blowback: True Depth at 80-180ft (With Chart). For deep drops in extreme tidal flows, compare your setup with the Sinker Weight and Wire Gauge for 3-5 Knot Currents (Chart) to ensure your terminal gear remains vertical.

       [Main Braided Line]
                |
          [3-Way Swivel]
          /            \
[Leader to Bait]   [Breakaway Dropper]
                         |
                   [Lead Sinker]
                         |
                 [Granite Pinnacle]

The 30-Second Batch Rigging Station

Re-rigging during an active drift over a tight pinnacle summit must happen in under 30 seconds. A vessel drifting at 1.8 knots covers roughly 3 feet of structure per second; a three-minute rigging delay pushes you 540 feet off the strike zone.

Pre-cut and rig your droppers at a cockpit prep station before launching. Cut standard extrusion monofilament (such as Maxima Ultragreen) into uniform 14-inch lengths. Tie a 1-inch Surgeon’s Loop at the top end for fast attachment to your brass three-way swivel or cross-line crane swivel.

Fasten a lightweight brass snap or an open loop knot at the terminal end. Store 20 pre-tied droppers on a closed-cell foam rigging cylinder, categorised by pound-test. When a weight snags, point the rod tip directly down the line, thumb the spool, and apply straight-line pressure until the dropper parts. Clip a fresh pre-tied loop onto your swivel, snap on replacement lead, and drop back down immediately.

For mechanical release mechanisms that rely on calculated release pressures instead of pure line failure, cross-reference our Clip Gram-Tension Calibration: Sinker vs Swell (Table).

Habitat Stewardship: Lead Mitigation and Non-Toxic Substrates

High-loss pinnacle structures accumulate spent tackle quickly. The Washington Department of Fish and Wildlife (WDFW) has monitored recreational fishing impacts on Puget Sound and coastal rocky reefs, documenting that high tackle densities can impact sensitive rockfish habitats.

To mitigate local heavy-metal deposits, switch to non-lead dense materials on known gear-eating pinnacles:

1. Cast Scrap Iron: Dense scrap iron or mild carbon steel slugs offer roughly 70% of the density of lead (7.8 g/cm³ versus 11.3 g/cm³). Iron oxidises into naturally occurring iron oxide over time without leaving toxic residues in the reef ecosystem.
2. Drilled River Cobble: Smooth, oblong river stones drilled with a masonry bit and fitted with a wire eye cost fractions of a cent per unit. While cobble requires roughly 40% more volume to match the mass of lead, its smooth profile wedges less frequently between columnar basalt fractures.

If you fish heavy tides in freshwater environments, compare these rigging practices to our guide on the Fraser River Sturgeon Sinker Table: 16-36oz (Worksheet).

Pre-spool a dedicated rigging foam with ten 20-pound and ten 25-pound sacrificial droppers tonight so your terminal gear is ready for immediate deployment on your next offshore drop.

Sources & Further Reading

Lingcod breakaway sinker systems depend on verified material physics, hydrodynamic drag calculations, and Pacific fishery management data to balance bottom holding against rapid sacrificial release.

A breakaway sinker rig is a terminal tackle arrangement where an intentionally weakened monofilament dropper loop connects a heavy lead weight to the main line, allowing the sinker to snap free when wedged in rocky substrate while preserving the hook and fish.

According to technical specifications published by the Cordage Institute in standard CI 1201, extruded nylon (monofilament) experiences an average elongation-at-break between 15% and 30%. This elongation provides shock absorption against surging ocean swells before the line reaches its ultimate tensile limit. Field measurements conducted by the Washington Department of Fish and Wildlife indicate that lingcod (Ophiodon elongatus) along the outer coast inhabit high-relief rocky pinnacles at depths frequently exceeding 120 feet, where deep currents impose over 3 pounds of hydrodynamic drag against standard 16-to-32-ounce lead sinkers. Standardizing your breakaway dropper to an exact breaking threshold prevents premature releases in the water column while ensuring predictable failure under direct rod pressure.

To confirm the mechanical threshold of your sacrificial dropper material before heading offshore, benchmark your line spools with a digital hanging scale rather than relying strictly on factory label ratings.

As an Amazon Associate I earn from qualifying purchases. Product links on this page are affiliate links — they cost you nothing extra.

⏱ 15 min read

BASE FORMULAS:
• Dead drift (<0.5 kt): 1 oz lead per 15 ft depth
• Moderate drift (0.5-1.0 kt): 1 oz lead per 12 ft depth
• Fast drift (1.0-2.0 kt): 1 oz lead per 8-10 ft depth
DEPTH TARGETS:
• 300 ft: 20 oz (calm) to 32 oz (current)
• 500 ft: 32 oz (calm) to 48 oz (current)
• 700 ft: 48 oz max conventional hand-crank limit
OPERATIONAL LIMITS:
• Max Line Scope: 30 degrees from vertical
• Recovery Rule: Scope >30° = reel up and reset drift
• Failure Point: Bait lifts 10+ ft off bottom when scoped

       SURFACE DRIFT: 1.5 KTS (NORTH)
 [Boat] ─────────────────────────────
    \
     \  Surface Layer (0-150ft)
      \
       )  COUNTER-CURRENT: 0.8 KTS (SOUTH)
      /   Mid-Depth Layer (150-400ft)
     /
    (   BOTTOM CURRENT: SLACK
     \  Deep Layer (400-600ft)
      |
    [32oz Sinker on Reef]

BLOWOUT ROOT CAUSE AUDIT:
[Sonar Depth]: _____ ft
[Line Counter at Bottom Contact]: _____ ft
[Calculated Ratio (Counter / Depth)]: _____ : 1
[Measured Drift Speed]: _____ knots
[Current Sinker Weight]: _____ oz
[Corrective Action]: Jump weight to _____ oz