rig zone上的Jackup利用率和日租金

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Jackup Rigs

Rig Type	Rigs Working	Total Rig Fleet	Average Day Rate
Jackup IC < 250' WD	34 rigs	49 rigs	$83,346.15
Jackup IC 250' WD	39 rigs	63 rigs	$109,117.22
Jackup IC 300' WD	95 rigs	125 rigs	$128,288.29
Jackup IC 300'+ WD	109 rigs	135 rigs	$158,691.79
Jackup IS < 250' WD	5 rigs	7 rigs	--
Jackup IS 250' WD	9 rigs	11 rigs	$118,500.00
Jackup IS 300' WD	2 rigs	4 rigs	$60,300.00
Jackup IS 300'+ WD	3 rigs	3 rigs	$125,000.00
Jackup MC < 200' WD	3 rigs	16 rigs	$28,000.00
Jackup MC 200'+ WD	11 rigs	28 rigs	$48,320.00
Jackup MS < 200' WD	2 rigs	2 rigs	--
Jackup MS 200'+ WD	8 rigs	19 rigs	$59,088.00

沧海水

Jackup IC/IS/MC/MS是什么意思啊？？？