Buoy Lower Portion Underwater

a. Lower Fender

• Record fender material.

• If timber, report any splintering or broken/missing sections.

• If rubber, report any tears, rips, or missing sections.

• If visible, record fender attachment method.

• Check for and report any rusted, loose, or broken attachments or bolts.

b. Buoy Bottom

• Record marine growth thickness.

• If there is no appreciable marine growth, check and record the type and condition of the protective coating (paint or fiberglass).

• Report any dents or other bottom hull damage.

c. Tension Bar

• Check lower tension bar eye for wear and measure its wire diameter with calipers.

• Check retaining plate and report any observed wear or warping.

d. Hawsepipe

• Measure and record chain wire diameter at the bottom of the hawsepipe.

• Check and report rubbing casting wear. If the rubbing casting is missing, then check for rusting and wear of the bell mouth.

• Ensure that chain is securely attached to rubbing casting.

e. Bottom Jewelry

• Identify and report each type of chain component between lower tension bar eye and riser chain.

• Measure and record component length and wire diameter.

• Report any observed wear or corrosion. /. Cathodic Protection System on Buoy

• Record number, size, and location of installed anodes.

• Ensure that each anode is securely attached to buoy.

• Use an underwater voltmeter or portable voltmeter and silver/silver chloride reference electrode as described in Section 3.4.5, measure the potential of the bottom of the buoy in at least three locations and record the potentials. The guidelines for interpretation of the potentials given in Table 3-4 also apply to steel buoy bottoms.

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