The only craft in military service thereafter were four Zodiac Rigid Hull Inflatable Boats in São Tomé harbour and one in Príncipe. Improvements to naval capabilities are considered vital to increase security in the exclusive economic zone ( EEZ ) to protect oil concerns and to stem the rise of coastal trafficking operations in the Gulf of Guinea area.

Rigid restrictions are observed for the concentrations of certain chemical substances which can affect the taste and quality of sake.

Rigid couplings are used when precise shaft alignment is required ; shaft misalignment will affect the coupling's performance as well as its life.

Rigid airships are often called Zeppelins, as the type was invented by Count Zeppelin and the vast majority of rigid airships built were manufactured by the firm he founded.

Rigid wooden or plastic yardsticks, 1 yard long and meter sticks, 1 meter long, are also used.

Rigid lenses are more chemically inert, allowing them to be worn in more challenging environments than soft lenses.

Rigid gas permeable lenses are very durable and may last for several years without the need for replacement.

Rigid dinghies can be made of glass-fibre reinforced plastic ( GRP ) but injection-moulded one-piece hulls are also available.

* Rigid multifunction self-rescue dinghies are designed to row, motor, tow, and sail.

Rigid dinghies for small yachts are very small ( 2 metres ), usually with a pram ( blunt ) bow to get more beam ( width ) in a shorter length.

Rigid rings are used differently: first each testicle is fed through the ring and the entire scrotum is pulled through, then the flaccid penis is pushed through the ring and situated against the body.

Rigid ladders are usually portable, but some types are permanently fixed to buildings.

Rigid ladders are available in many forms, such as:

Rigid bracelets, usually from metal, wood, or plastic, are referred to as bangles or bangle bracelets.

* Rigid categories are monoidal categories in which duals with nice properties exist.

Rigid bodies are also characterized as being non-deformable, as opposed to deformable bodies.

Rigid designators are contrasted with non-rigid or flaccid designators, which may designate different things in different possible worlds.

Rigid borescopes are similar to fiberscopes but generally provide a superior image at lower cost compared to a flexible borescope.

Rigid borescopes are therefore better suited to certain tasks such as inspecting automotive cylinders, fuel injectors and hydraulic manifold bodies, and gunsmithing.

Rigid organisational structures are infested with managers who protect both their budgets and their power base.

Rigid lenses are generally considered to be not as comfortable as soft contacts, and, if worn while the eyes are open, can feel similar to an eyelash trapped in the wearer's eye, especially during initial wear periods.

* Rigid removable tanks are installed in a compartment designed to accommodate the tank.

* The Rigid heat shield has, until recently, been made from solid steel, but is now often made from aluminium.

Rigid flatfoot, a condition where the sole of the foot is rigidly flat even when a person is not standing, often indicates a significant problem in the bones of the affected feet, and can cause pain in about a quarter of those affected.

Rigid airships may have further passenger or cargo space internal to the envelope.

Rigid contact lenses may be removed by pulling the eyelid tight and then blinking.

Rigid sigmoidoscopy may be useful in ano-rectal diseases such as bleeding per rectum or inflammatory rectal disease, particularly in the general practice and pediatrics.

Rigid may be required for certain areas and additionally, vapor-lock fittings may be required in areas where a fire or explosion hazard is present ( such as gas stations, chemical factories, grain silos, etc.

Rigid or flexible borescopes may be fitted with an imaging or video device.

Rigid or rigidity may refer to:

Of other papers in which he dealt with this and kindred branches of physics may be mentioned " Observations with a Rigid Spectroscope ," " Heating of a Disc by Rapid Motion in Vacuo ," " Thermal Equilibrium in an Enclosure Containing Matter in Visible Motion ," and " Internal Radiation in Uniaxal Crystals.

There are a number of physical processes which may cause contraction with increasing temperature, including transverse vibrational modes, Rigid Unit Modes and phase transitions.

In the case of hard drives, the FFS filesystem could be placed onto the drive RDB ( Rigid Disk Block ) and executed on boot ; it could also be kept on disk for mounting other FFS volumes.

* Continuous Collision Detection, especially in Rigid body dynamics.

Rigid bodies have size and shape, but retain a simplicity close to that of the particle, adding just a few so-called degrees of freedom, such as orientation in space.

* LR ( Light Rigid )-A ' Class LR ' covers a rigid vehicle with a GVM ( gross vehicle mass ) of more than 4. 5 tons but not more than 8 tons.

* MR ( Medium Rigid )-A ' Class MR ' covers a rigid vehicle with 2 axles and a GVM of more than 8 tons.

* HR ( Heavy Rigid )-A ' Class HR ' covers a rigid vehicle with 3 or more axles and a GVM of more than 15 tons.

* ` Class 2-Medium Rigid Vehicle ' - Any rigid vehicle with GLW less than 18, 001 kg ( with Light Trailer up to 3500 kg or less ), any combination vehicle with GCW less than 12, 001 kg, any rigid vehicle of any weight with no more than 2 axles, or any Class 1 vehicle.

The General Problem of the Motion of Coupled Rigid Bodies about a Fixed Point.

Rigid foams based on polymeric MDI ( PMDI ) offered better thermal stability and combustion characteristics than those based on TDI.

Rigid airships have a structural framework which maintain the shape and carries all loads such as from gondolas, engines.

Rigid and stern at first, she slowly becomes seduced by the West and the Count, who falls in love with her.

* Alaska Science Forum, May 7, 1981, Rigid Insulation, Article # 484, by T. Neil Davis, provided as a public service by the Geophysical Institute, University of Alaska Fairbanks, in cooperation with the UAF research community.

Rigid lenses can also be made as a front-toric, back-toric, or bitoric.

Rigid lenses can also correct for corneal irregularities, such as keratoconus.