$60

NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE

Fig. 4 shows the " T " and " B " Patent Shding Hatch Beam.
Time is saved and accidents avoided when this beam is fitted, as it need
not be unshipped but simply pushed by hand forward or aft to any desired
position as indicated in the illustration.
for the purpose of handling cargo, for trimming, or for ventilation,
and the coamings are less than 2 feet 6 inches in height; such
hatches shall either be fenced to a height of 3 feet or be securely
covered. Hatch coverings shall not be used in the construction of
deck or cargo stages, or for any other purpose which may expose
them to damage.
No person shall, unless duly authorised or in case of necessity,
remove or interfere with any fencing, gangway, gear, ladder, hatch