The Simplest Way to Prove a Pipe Is Actually Dead
A 28-year dive supervisor explains why breaking a flange is the only foolproof test for a dead pipe - and how to do it safely.
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How to Read a Sonar Image If You Are Not a Surveyor
Side-scan sonar secrets for bridge inspectors: shadows, scale, artifacts, and a field checklist. Written by an NHI-qualified engineer.
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Keeping a Dive Crew Warm Enough to Stay Useful
Advice from a Gulf of Mexico diving superintendent on keeping divers and deck crew warm in cold water operations.
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The Two Measurements That Decide Repair or Replace on Steel
Marine contractor explains the two measurements that determine whether to repair or replace corroded steel piles and seawalls.
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Setting a Mooring That Will Not Drag
A salvage master's field-tested rules for setting a mooring that holds in mud, sand, and storm. Read before you drop the hook.
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Working a Tide Window Without Running Out of Time
Marine contractor's plain-spoken guide to planning a tide window: read the water, back off the deadline, and always keep an exit plan.
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Checking a Prop for Damage Without Pulling It
A Fort Lauderdale yacht diver shows how to inspect a propeller in the water for nicks, bends, and balance problems before paying for a haul-out.
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The Cheapest Way to Extend a Failing Dock by Five Years
Stack new piles beside failing ones, bolt a steel saddle, and buy five years on a dock—without a full rebuild.
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How to Sequence a Marina Repair So Slips Stay Rentable
Marine contractor Ed shares how to sequence marina repair jobs for minimal downtime and lost rent. Tips on phasing slips, staging materials, and timing.
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Judging Concrete Underwater by Sound
A marine contractor teaches how to read underwater concrete by sound: tremie rumbles, slurps, and hollow taps.
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How Divers Keep Potable Water Gear Actually Clean
A water operations manager shares the two-stage decon routine that stops divers from contaminating drinking water tanks.
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Spotting Stray Current at a Dock Before It Eats Your Boat
How to spot stray current at a dock: check anodes, measure voltage, sniff for chlorine, and read the marina's history.
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