Well, not the SR2 Victor, but perhaps the Vulcan SR2 or B2MRR as it became...
Up to 40k-ish, then hours of boredom boat-spotting. Nav radar would look for surface contacts, then read details to co-pilot who had to write them all down plus the time. When there was a quiet bit, Nav team would then attempt to plot all the boats on a chart. This mind-numbingly boring activity would be done in in various patterns, but was pretty much the same. Occasionally you'd be joined by a disposable Canberra with its kamikaze crew; first they had to formate on the Vulcan and update their clockwork nav kit from the Vulcan's (by the nav reading out the Lat and Long..), then they'd rush of to do a 'Lopro' identification of a selected boat, they'd then call back the ident over the RT before they were shot down. Yeah, right.
Or there was 'Selfpro' - this time once the navigators had worked out a suitable target, you descended to low level to try and identify it. Futile but fun...
We absolutely hated this damn boat-spotting. Out on a Cyprus det we were tasked to do a bit, so lumbered around a bit up at 40K spotting Greek fishing boats, then down to low level to chase them. Unfortunately the Secret Squirrels of the MHQ hadn't told us what their ever-so-secret Nimrod MRs were doing; hence charging around at low level with our H2S banging away caused the Sovietski submarine they were shadowing to f*ck off in fine pitch. Our captain was summoned to MHQ, but replied that the crystal ball was a bit cloudy and if the maritime people hadn't told him to keep out of a specific area, then he'd do what he pleased. Later we were chased by an F-14 when we went to have a look at a Spam carrier, intercepted by Italian F-104s when our idiot Nav Plotter's northerly track straight into the Rome FIR from the direction of Libya triggered the Italian QRA.... Our captain thought they were Libyan Floggers, but what would you expect from an ex-Brittania truckie who hadn't the slightest interest in ac recce....
MRR - Nimrod, E-3 or whatever, you're b$oody welcome to it!