J-4 HEAVY WEATHER PLAN.docx

HEAVY WEATHER PLAN

SERM-507-22

VINDICATOR TSV5

1. Maintain a written Heavy Weather Plan that must be implemented during gales, storms, hurricanes, and destructive weather, including mooring calculations. The documented Heavy Weather Plan must be submitted to the SUPERVISOR for a document review, acceptance and approval. The contractor must have an acceptable documented Heavy Weather Plan in place no later than 15 days prior to availability start date. The Heavy Weather Plan must be subject to periodic conformity audits by the SUPERVISOR throughout the contract.

1.2 Submit updated or changed plans to the SUPERVISOR as they occur.

1.3 Ensure that the plan designates responsibility and implements procedures for prevention of damage to naval ships, craft, barges, and lighters. This includes periods when ships, craft, barges, and lighters are physically located in private contractors' plants; during times when work on ships, craft, barges, and lighters at naval facilities requires openings to hulls or decks; and when contractor owned/furnished floating equipment is tied alongside ships, craft, barges, and lighters.

1.4 The plan must contain specific responsibilities and detailed actions to be taken during the weather conditions listed below.

2. Conditions where there is substantial advance warning for approaching adverse weather are addressed by the following 4 categories:

2.1 Gale/Storm/Hurricane Condition IV: Trend indicates a possible threat of destructive winds of force indicated within 72 hours.

2.2 Gale/Storm/Hurricane Condition III: Destructive winds of force indicated are possible within 48 hours.

2.3 Gale/Storm/Hurricane Condition II: Destructive winds of force indicated are anticipated within 24 hours.

2.4 Gale/Storm/Hurricane Condition I: Destructive winds of force indicated are anticipated within 12 hours or less.

3. Conditions where there is little or no advance warning for approaching adverse weather are addressed by the following 2 categories:

3.1 Thunderstorm/Tornado Condition II: Destructive winds accompanying the phenomenon indicated are reported or expected in the general area within 6 hours. Lightning and thunder are also anticipated.

3.2 Thunderstorm/Tornado Condition I: Destructive winds accompanying the phenomenon are imminent. Lightning and thunder are also anticipated.

4. Ensure that the plan contains, as a minimum, the following information as dictated by conditions listed above.

4.1 Steps to be taken to remove or secure staging items or equipment on decks of ships, craft, barges, and lighters, pier or dry dock, including cranes that could become wind-borne.

4.2 Protection of ships, craft, barges, and lighters from damage from other floating equipment, such as barges, doughnuts, work floats, and other ships, craft, barges, and lighters.

4.3 Provisions for protection of government equipment and material in custody of the contractor from damage by pier side flooding.

4.4 Provisions for removal of temporary hoses, welding lines, air lines, oxygen/acetylene lines, etc., extending through watertight closures.

4.5 Provisions for access to the ship for personnel and emergency equipment during and immediately following the storm consistent with prudent safety precautions.

4.6 Assurance that all hull/deck openings are made watertight.

4.7 Steps to be taken to secure floating piers during high winds/high tides.

4.8 The name and telephone number (business and residential) of the private contractor's single point of contact. This person must have the authority to commit the contractor to take necessary actions as requested by the SUPERVISOR.

4.9 Provisions for operation and manning of a Hurricane Control Center, with capabilities of telephone and portable radio communications SUPERVISOR duty personnel.

5. Ensure that the plan contains the following mooring related information:

5.1 Specify steps to be taken to secure ships, craft, barges, and lighters to contractor's pier, dry dock, graving dock, marine railway, or contractor's other facility. Information must define specific precautions to be taken and supporting calculations, to include limits of docking blocks and dock stability for both normal and heavy weather conditions. Calculations for heavy weather configurations must include wind and tidal considerations.

5.2 Provide the heavy weather state at which the ship must be undocked.

5.3 Submit mooring calculations for the worst anticipated loading condition during the availability. For ships with a self-compensating fuel system, the loading condition must show the self-compensation fuel system full of water, fuel, or some combination of fuel and water, projecting the worse possible condition as shown in calculations for maintaining ship’s stability. Determine the combined loading due to wind load from each direction and both peak flood and ebb current loads at low and high tides. Calculations may require re-submittal if significant changes occur from the original estimate on which the calculations were based.

5.4 For ships in dry dock, provide limits and supporting calculations for listed conditions. Analyze both the "normal" dock configuration and the "heavy weather" configuration.

5.5 Maximum safe wind speed and surge for side block strength and stability. Include maximum loading of the side blocks on ship.

5.6 Maximum safe wind speed and surge for dry dock strength and stability.

5.6 Surge required to float ship.

5.7 Table or graph showing safe combinations of wind speed and surge.

5.8 For ships pier side, provide limits and supporting calculations for ship loading conditions specified in 5.3. Analyze the "heavy weather" mooring configuration that would be used during the conditions specified in 1.3. Analyze worst-case wind directions including frontal, broadside, and quartering.

5.9 Maximum safe wind speed for mooring strength. Include strength of pier, pier fittings, mooring lines, and shipboard fittings. Maximum applied load on any mooring line must be the breaking strength of the mooring line divided by 2.5 (factor of safety of 2.5).

5.10 Maximum safe surge for mooring.

6. Maximum safe elongation of mooring lines. Include the following information:

6.1 Size and type of mooring line; Percent elongation of mooring line at failure;

Tattletale-free length and length between attachments.

6.2 Sketch, showing size, type, and location (vertical and horizontal angles) of all securing devices including fenders, bumpers, and camels.

6.3 Include the following statement, providing the necessary data:

USS __________ can be safely moored to withstand a maximum of ___ mph winds with a __ knot current and a __ foot storm surge.

7. NOTES:

7.1 The SUPERVISOR will set Conditions of Readiness consistent with the forecasts and advisories of the local Weather Service Office of National Oceanic and Atmospheric Administration (NOAA).

7.2 NOAA defines the 5 categories of hurricanes as follows:

CATEGORY WIND SPEED STORM SURGE

1 74 - 95 MPH OR 4 - 5 FT ABOVE NORMAL

2 96 - 110 MPH OR 6 - 8 FT ABOVE NORMAL

3 111 - 129 MPH OR 9 - 12 FT ABOVE NORMAL

4 130 - 156 MPH OR 13 - 18 FT ABOVE NORMAL

5 157 MPH OR HIGHER OR GREATER THAN 18 FT ABOVE NORMAL

7.3 Attachment C contains regional heavy weather conditions based on historical data and is provided as information only; the historical data is not intended to place limitations/restrictions on other values appropriate and/or previously authorized by a Naval Supervising Activity for their cognizant contractor(s) sites.

7.4 The Heavy Weather Plan submitted in 1 requires a one-time submittal/acceptance unless references change or contractor's status changes.

ATTACHMENT A

(Knots)

(Feet)