Tug Lights Warning
2.2.3 Widespread Use of Substandard Navigation Lights in the Towing Industry
Canada's largest tug boat fleet is located in B.C., where log booms and barges ply the coastal waters in all conditions of visibility, often near commercial and recreational vessels. In a congested area at night, tugs and their tows pose a greater threat to maritime safety than do most other vessels because the cable connecting them lies hidden a short distance below the surface of the water and there is no visible link between the two. A vessel operator who attempts to pass astern of a working tug without being aware of navigation lights displayed by tugs and tows is in danger of colliding with the submerged towline or the towed object. The danger of such an occurrence increases as the visibility range of critical navigation lights aboard the tug or tow decreases.
"Scotty" lanterns, like that tested by the TSB, were manufactured with a maximum visibility range of one mile (using a clear lens). They were marketed and distributed to wholesale and retail suppliers as barge, boom or anchor lights, and subsequently were sold to customers in the industry, who used them as navigation lights. While manufactured as an all-round white light, the light was subsequently modified, for use as a sidelight, by substituting the clear lens with a coloured lens. The owners of the tug and barge maintained an inventory of these lanterns and used them from time to time on barges, as temporary sidelights, despite their visibility range being significantly below the requirement of three miles, which was set for safety purposes.
To help ensure that only navigation lights that meet regulatory requirements are used by owners/masters of vessels, the regulations call for "proof of compliance", be it in the form of documentation or a label.[4] Consequently, the industry, including the owners of the tug and tow, ought to have been aware that lights meeting regulatory requirements are available on the market and must be carried on board all tugs and tows. Approval from TC had not been received to permit "Scotty" lanterns to be used as a substitute for navigation lights required by regulations. The "Scotty" lanterns sold by manufacturers did not carry a proof of compliance document or label. In this instance, the navigation lights, including a spare set (oil lanterns), were carried by the tug.
Further, unmanned barges such as Texada B.C. are not subject to inspection by TC. As such the onus is on the owners/masters to ensure that navigation lights used on barges meet the prescribed safety range requirement and carry proof of compliance document or label.
Given the long history of the use of these navigation lights within the industry, and given that these lights are supplied by the company for use as navigation lights, the ship's complement had no reason not to accept them as such. Consequently, the risk associated with the use of these lights was unrecognized and the safety threshold was thus lowered. Reason's model of accident causation is used to illustrate, from a systemic perspective, a number of safety defences that had been breached. The result is the widespread use of lights for navigation purposes that do not meet the safety range of visibility (Figure 1).
This accident happened during the fireworks festival in Vancouver, when a Bayliner cut between the tug and barge.
a substandard barge light
dark barge against stanley park
harbormaster allowed commercial traffic during huge event
no watch on bridge
adjusting cable out long distance
tug doing 7.5 kn
no vhf monitoring of 16 by victim
http://www.tsb.gc.ca/eng/rapports-reports/marine/1999/m99w0133/m99w0133.asp#a411