Time formula please...

[pace36]

Can anyone help me with a time formula.

Left hand columns are example of what I'm trying to achieve.

HW Oban changes daily (manually input) all other locations change automatically through formula.

Thanks!

-- Friday 30/3/2018	HW	(BST) --			-- Friday 30/3/2018	HW	(BST) --
HW Oban		18:21			HW Oban		18:21
HW Crinan	(-0:47)	17:34			HW Crinan	(-0:47)	######
Dorus, C'veckan, Cuan turn at	16:04			Dorus, C'veckan, Cuan turn at (-2:17:00)HW Oban	######
Craobh	(-1:00)	17:21			Craobh	(-1:00)	######
Easdale	(-0:25)	17:56			Easdale	(-0:25)
West Loch Tarbert	(-3:30)	14:51			West Loch Tarbert	(-3:30)
Small Isles, Jura	(-3:00)	15:21			Small Isles, Jura	(-3:00)
Duart & Arisaig	(+0:15)	18:36			Duart & Arisaig	(+0:15)
Lochaline	(+0:12)	18:33			Lochaline	(+0:12)
Tobermory	(+0:16)	18:37			Tobermory	(+0:16)
Lochalsh/Kyleakin	(+0:50)	19:11			Lochalsh/Kyleakin	(+0:50)
Canna	(+0:40)	19:01			Canna	(+0:40)
Mull of Kintyre	(-5:00)	13:21			Mull of Kintyre	(-5:00)
Portree	(+0:55)	19:16			Portree	(+0:55)
Bunessan	(-0:15)	18:06			Bunessan	(-0:15)
DOVER	(+5.30)	23:51			DOVER	(+5.30)
CLYDE (Inveraray)	(-5:30)	12:51			CLYDE (Inveraray)	(-5:30)

[#2]

@pace36 , what do you change exactly, 18:21? What are other parameters for the formula, texts like (-0:47) in next row or that is result?

Better if you attach small sample file.

[#3]

@Sergei Baklan 

Hi Sergei

Thanks for replying.

Columns A-C are example.

I would input HW time of tide in cell H2 (& height in G2)

Formula would then place HW Craobh in cell H7 - Time is H2(18:21) less G7 (-1-00) = 17:21

Same formula for each port listed rows 8-20

H4 is 2:17hrs before H2 - Different formula

Hope that helps...

[#4]

@pace36 ,

You need to convert your texts with time difference into the time (which is actually decimal number) and taking into account what time is always shall be positive.

That could be like

=$H$2+IF(MID(G7,2,1)="-",-1,1)*MID(G7,3,LEN(G7)-3)

[#5]

@Sergei Baklan 

Works a treat - Thank you!

[#6]

@pace36 , you are welcome