Marina

A marina (from Spanish [maˈɾina], Portuguese [maˈɾinɐ] and Italian [maˈriːna]: marina, "coast" or "shore") is a dock or basin with moorings and supplies for yachts and small boats. A marina differs from a port in that a marina does not handle large passenger ships or cargo from freighters.

The word marina is also used for inland wharves on rivers and canals that are used exclusively by non-industrial pleasure craft such as canal narrowboats.

Emplacement

Marinas may be located along the banks of rivers connecting to lakes or seas and may be inland. They are also located on coastal harbors (natural or man made) or coastal lagoons, either as stand alone facilities or within a port complex.

Facilities and services

A marina may have refueling, washing and repair facilities, marine and boat chandlers, stores and restaurants. A marina may include ground facilities such as parking lots for vehicles and boat trailers. Slipways (or boat ramps) transfer a trailered boat into the water. A marina may have a boat hoist well (a traveling crane) operated by service personnel. A marina may provide in- or out-of-water boat storage.

Del

Del, or nabla, is an operator used in mathematics, in particular, in vector calculus, as a vector differential operator, usually represented by the nabla symbol ∇. When applied to a function defined on a one-dimensional domain, it denotes its standard derivative as defined in calculus. When applied to a field (a function defined on a multi-dimensional domain), del may denote the gradient (locally steepest slope) of a scalar field (or sometimes of a vector field, as in the Navier–Stokes equations), the divergence of a vector field, or the curl (rotation) of a vector field, depending on the way it is applied.

Strictly speaking, del is not a specific operator, but rather a convenient mathematical notation for those three operators, that makes many equations easier to write and remember. The del symbol can be interpreted as a vector of partial derivative operators, and its three possible meanings—gradient, divergence, and curl—can be formally viewed as the product with a scalar, dot product, and cross product, respectively, of the del "operator" with the field. These formal products do not necessarily commute with other operators or products.

Sud Sound System

Sud Sound System is a dancehall reggae sound system from Salento, Apulia, Italy. The group combines Jamaican rhythms and local culture, like their Salentino dialect of Sicilian language in their lyrics and dance moves from pizzica and tarantella. They are pioneers of Italian ragga music, a branch of reggae. Although the group is popular throughout Italy, they have become well known for their lyrics—always in dialect—about social, political, and economic issues in Southern Italy.

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Sound system

Sound system may refer to:

Technology

Culture

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See also