The phrase "ad hoc viewing" is correct and usable in written English.
It can be used to describe a viewing or observation that is done for a specific purpose or situation, rather than as part of a regular or planned schedule.
Example: "The team conducted an ad hoc viewing of the footage to address the immediate concerns raised by the stakeholders."
Alternatives: "improvised viewing" or "on-the-spot viewing".
At an ad hoc viewing ceremony in a shopping center at the edge of town, giddy men and children lined up to see the colonel's body, lying on a mattress in a meat locker.
The influential painter Jutta Koether, for instance, does not only paint; she also designs the presentation of her paintings, complete with special lighting and ad hoc viewing platforms, and sometimes performs in the gallery alongside them.
Unfortunately, they have made little progress, because they have started, for the most part, with an impoverished, ad hoc view of thinking.
With this information, profiles can be created at different levels of aggregation, for example, for individual patients, at the provider level, at the level of diseases treated, and for many other ad hoc views.
But even they are not enough to handle the tons of strontium-laced water at the plant — a reflection of the scale of the 2011 disaster and, in critics' view, ad hoc decision making by the company that runs the plant and the regulators who oversee it.
The reporter Amy Harmon wrote in the Times that some autistics view themselves as part of "an ad hoc human rights movement," and view autism itself as "an integral part of their identities, much more like a skin than a shell, and not one they care to shed".
There is no uniform approach for organizing ICIs, there is little infrastructure to assist student planning, and the process is often viewed as ad hoc [ 18, 19].
Suddenly, teams everywhere were unveiling green initiatives, or publicizing efforts that until then had been ad hoc and out of view.
Decisions are sometimes viewed as an ad hoc activity with no need for process, but if they're serious work, they need a process to guide them.
Many wireless sensor networks can be viewed as multihop ad hoc networks.
It makes you insurrectionary, if only in imagination, and it leads you quickly into worlds that never pretend to represent the representative views of ad hoc citywide reading-week committees.
