In the script, right before the "stand by for evasive", line he says---"red alert, raise shields!"---but those lines are cut out.
The next shot of the Grissom bridge shows in fact the bridge bathed in the red lighting of the red alert mode.
So the writers intent was to show all he did all he could in the few seconds he had. We know that it takes a few seconds to raise shields as we saw in TWOK.
So he immediately signaled intent to take evasive, ordered red alert, started the process of raising the shields.
BUT
Nimoy WANTED him to appear incompetent so he cut that part out.
Nimoy's entire intent in TSFS was to show everyone else in Starfleet as incompetent and insensitive, rude and arrogant.
He even mentions in the TSFS commentary that he picked PICK as the color for the Grissom chairs as an insult to Esteban. Listen for yourself--it is in the solo commentary he did for the 2-disc DVD.
Because it's better drama when your adversaries are fools, losers and straw men! Right?
COMM OFFICER
Sir... Something's jamming our
transmission. An energy surge.
ESTEBAN
Locate.
COMM OFFICER
Surge from astern, sir. Aft
quarter!
ESTEBAN
On screen.
On MONITOR, a starfield aappears, with some kind of
energy interference. A heat-like distortion of one
area of the picture is evident. Then, suddenly, by
means of the de-cloaking effect, the Bird of Prey is
dead on a at close range in attack configuration.
ESTEBAN
Oh, my God!
91 INT. BRIDGE - BIRD OF PREY - FAVORING KRUGE 91
& &
91A 91A
KRUGE
(Tube one, target, engine section
only!)
GUNNER
(Ready!)
91B SPACE - BIRD OF PREY STALKS GRISSOM - (ILM) 91B
92 BACK TO BRIDGE - GRISSSOM (INTERCUT WITH PLANET & BIRD 92
OF PREY)
ESTEBAN
Red alert! Raise shields!
SAAVIK (V.O.)
Captain, what's happening?!
ESTEBAN
We are under attack! Stand by for
evasive -- stand by for --
93 INT. BIRD OF PREY 93
KRUGE
(Fire!)
The next shot of the Grissom bridge shows in fact the bridge bathed in the red lighting of the red alert mode.
So the writers intent was to show all he did all he could in the few seconds he had. We know that it takes a few seconds to raise shields as we saw in TWOK.
So he immediately signaled intent to take evasive, ordered red alert, started the process of raising the shields.
BUT
Nimoy WANTED him to appear incompetent so he cut that part out.
Nimoy's entire intent in TSFS was to show everyone else in Starfleet as incompetent and insensitive, rude and arrogant.
He even mentions in the TSFS commentary that he picked PICK as the color for the Grissom chairs as an insult to Esteban. Listen for yourself--it is in the solo commentary he did for the 2-disc DVD.
Because it's better drama when your adversaries are fools, losers and straw men! Right?

COMM OFFICER
Sir... Something's jamming our
transmission. An energy surge.
ESTEBAN
Locate.
COMM OFFICER
Surge from astern, sir. Aft
quarter!
ESTEBAN
On screen.
On MONITOR, a starfield aappears, with some kind of
energy interference. A heat-like distortion of one
area of the picture is evident. Then, suddenly, by
means of the de-cloaking effect, the Bird of Prey is
dead on a at close range in attack configuration.
ESTEBAN
Oh, my God!
91 INT. BRIDGE - BIRD OF PREY - FAVORING KRUGE 91
& &
91A 91A
KRUGE
(Tube one, target, engine section
only!)
GUNNER
(Ready!)
91B SPACE - BIRD OF PREY STALKS GRISSOM - (ILM) 91B
92 BACK TO BRIDGE - GRISSSOM (INTERCUT WITH PLANET & BIRD 92
OF PREY)
ESTEBAN
Red alert! Raise shields!
SAAVIK (V.O.)
Captain, what's happening?!
ESTEBAN
We are under attack! Stand by for
evasive -- stand by for --
93 INT. BIRD OF PREY 93
KRUGE
(Fire!)