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TB 55-1900-232-10
rig conforms to appropriate engineering and design criteria; consultation with NAVSEA OOC is recommended.
a. Ensure that all rigging is adequate. If in doubt, use a higher safety factor. Pay particular attention to protection from
b. Ensure that multiple tows are configured for optimum seakeeping ability. For example, the Honolulu rig permits
adjustment during transit.
c Identify the type of towing rig required for the conditions anticipated during the transit and at either end of the tow.
d Provide for a secondary towing rig on the tow in case the primary system is lost. Make provisions for anchoring the tow
in case of emergency. Provide for all contingencies, as outlined in the check-off list.
e. Always carefully consider assigning riding crews on tows. The decision generally is based upon safety of the tow
rather than upon habitability or administrative factors
(1) Fleet CINCs authorize riding crews in accordance with existing directives. Considerations governing the use of
a riding crew include.
(a) duration of the voyage
(b) route
(c) expected and forecast weather
(d) experience and class of towing ship
(e) material condition of the tow
(f) flooding alarms and other monitoring devices installed on board
(g) habitability considerations for riding crew
(2) Riding crews shall be limited to personnel required for maintenance and security during the voyage
(3) When the tow has a Commanding Officer or Officer-in-Charge regularly assigned, the Commanding Officer of
the towing ship will obtain a written statement from this officer that the tow is seaworthy and ready for sea. This
requirement is in addition to the items on the check-off list referred to in Appendix H
f. The Commanding Officer of the tug has overall responsibility once he accepts the tow.
g. The Commanding Officer or the Officer-in-Charge of the riding crew must ensure that
(1) Adequate training and necessary drills are performed, including firefighting, flooding and other material condition
drills; and drills for abandoning ship, boat launching, communications with the tug and securing a secondary towline.
Security watches of machinery, watertight integrity, the towline, navigational lights, communications and other
watches as necessary shall be stationed.
(2) There is an adequate method of boarding the tow at sea When feasible, fixed ladder rungs are preferred. See
(3) The preparations include the pre-positioning of radios, pumps, hoses, tools, firefighting
equipment and handling gear ready for use by either the riding crew or tug personnel
who would board the tow. The towing plan considers these requirements: messing and berthing quarters for the
riding crew, plus auxiliary power, fuel, damage-control equipment and life-saving gear.


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