ADM 239/261把前卫的职责写的清清楚楚
如果觉得可以放弃，直接决战，你可以不要派前卫没关系，反正你不是海军将领
1.前卫有跟敌人舰队做第一时间接触的职责
If, when the fleet is at sea in daylight, enemy forces are in the vicinity,
they should be reported by reconnaissance forces, and contact should occur
between the advanced forces of the two fleets.
前述Reconnaissance包含航空侦查
因为航空侦查不够可靠(起码二战前都是)
所以前卫接触后以前卫的情报为主
The primary duty of reconnaissance aircraft is to locate and report both the
enemy battlefleet and aircraft carriers, subsequently keeping them under
observation while endeavouring to remain unseen. When visual contact has been
made between the advanced forces of the two fleets, air reconnaissance will
no longer be needed and these aircraft will take over action observation
duties.
确切一点说 是侦查(Reconnaissance)跟locate的区别
2.引导舰队的部署方向
It is very desirable that the probable direction of deployment is signalled
early, in order that the cruisers can destroyers can gain an advantageous
position in the van. Until this is signalled, the advanced forces will
endeavour to maintain a position near the line joining the two battlefleets.
As the movements of the enemy flotillas may be an indication of direction of
deployment, it is of the utmost importance that these should be reported to
the Admiral.
3.阻止对手进入雷击位
The advanced forces will endeavour to prevent enemy flotillas and cruisers
from reaching a position favourable for torpedo attack on the British
battlefleet. The secondary armaments of the battleships will also be used to
counter torpedo attacks, more especially when attacks are developing on the
beam of the battlefleet. In the even of a heavy attack developing, it may
also be necessary for the capital ships to use their main armaments to
disperse enemy flotillas and cruisers.
Screen?我何时谈论过Screen的职能? 屏卫就是屏卫
ADM里也写到了
无论是高速战列或战巡都能执行支援巡洋舰的职责
Either battlecruisers or fast battleships may be detailed to support the
cruisers ahead of the fleet. For convenience these vessels are referred to as
battlecruisers and the instructions which follow apply to either type of
ship, when carrying out this duty.
还有，对于战场情势，战巡传达的报告是最优先级，相较于前卫队中其他巡洋和驱逐
Although many reports from other ships of the advanced forces may be
expected, signals from the Senior Officer of the battlecruisers during his
approach and action giving the general situation will be of particular value
to the Admiral.