Ensure you have enough Teflon tape to seal all the threads

Connect hoses, pressure lines and check for leaks

Ensure that all fittings in use are similar

Ensure that all hoses and fittings are rated for the quad pressure and hose end fittings are checked for fatigue cracks

Red

None

Yellow

Green

Analysed prior to connecting to the umbilical

Connected to the umbilical and analysed while on line

Analysed only if there is doubt as to the quad markings

Analysed prior to connecting to the umbilical and analysed continuously while on line

It is of no consequence.

The operating radius of the vessel remains the same regardless of depth.

The deeper the water, the greater the operating radius of the vessel.

The operating radius of the vessel is increased in shallow water.

No risk of collision exists

Vessels indicated position and heading is within pre-determined limits for all but brief and isolated periods

All of the above

The vessel is under D.P. control and the D.P. system is operating normally with all the appropriate back-up systems available

The distance between the nearest thruster and the point of tending less 5 metres

The distance between surface and the wet bell or basket

The distance from basket and worksite

The draft of the vessel

A P.A. announcement from the bridge

A distinctive audio alarm

An alternating green and yellow light

A warning sign on display

The deeper the water the greater the operating radius

The operating radius is increased in shallow water

The operating radius remains the same regardless of depth

The operating radius remains the same regardless of depth

The distance from basket and worksite

The distance between the nearest thruster and the point of tending less 5 metres

The draft of the vessel

The distance between surface and the wet bell or basket

The antenna on the vessel

Neither of the above

The antenna on the platform or structure

A combination of one or both of the above

One with one on standby

At least two, with one on standby

Three

One, one on standby and one switched off

Analysed prior to connecting to the umbilical

Not requiring analysis as it states contents on gas quad

Connected to the umbilical and analysed while on line

Analysed prior to connecting to the umbilical and analysed continuously while on line

In conjunction with a number of different transducers

Only if used with a transponder on the end of a taut wire

With a number of different transponders

Only if used with a transponder on the artemis fixed position

48 hours

12 hours

24 hours

36 hours

The dive supervisor informs the D.P. operator on the bridge

The yellow light in dive control is switched on

The tender takes up the divers slack

The divers platform is recovered to surface