Slot

1) In aviation, an allocated time slot for aircraft take-off. In shipping, space on board a vessel occupied by a container, or a sailing schedule allocation.

Sleeper pod

1) Relatively new term referring to the attachment on top of a heavy vehicle cab of a 'pod' (usually made of fibreglass) in which driver sleeps. Favoured in certain operations (eg with maximum length drawbar combinations) because requires no additional chassis length as with conventional sleeper cabs but frowned upon by governments/unions because of limited accommodation provided.

Sleeper cab

1) Vehicle cab with provision of driver's bunk (may be two such), usually behind seats, for sleeping. Opposite of day cab. See also Sleeper pod.

Skip changing

1) The practice of missing intermediate gears when changing up or down through the gearbox of a heavy vehicle. See also Block changing.

Skidchek

1) Product of Grau-Girling. Claimed undisputed leader in vehicle anti-lock braking systems. Especially fitted to trailers.

SK

1) Nationality symbol for Slovakia - to be shown on the rear of vehicles from that country.